Phonology and Morphology
If you want to help English learners crack the code of a new language, you need to understand the code itself. Phonology is the study of sound systems, and morphology is the study of word structure. Together, these two areas explain why ELs pronounce words the way they do, why they make certain spelling errors, and how systematic instruction in sounds and word parts accelerates both decoding and vocabulary development. This lesson gives you everything you need to answer CTEL Domain 1 questions on these topics with confidence.
You will move through the sound system of English, explore how it compares to the sound systems your students bring with them, and then dig into the building blocks of words. By the end, you will have a toolkit of instructional strategies grounded in linguistic theory.
(1) Phonology: The Sound System of English
(A) What Phonology Studies
Phonology is the branch of linguistics that examines how sounds function within a specific language. It is not simply the catalogue of sounds a language uses. It is the set of rules governing which sounds can appear, where they can appear, and how they contrast with one another to create meaning. When you teach phonics or work with a student who says "ship" as "chip," you are operating in the domain of phonology whether you realize it or not.
The central unit in phonology is the phoneme, defined as the smallest unit of sound that distinguishes meaning. Swap one phoneme and you get a different word. Change /p/ to /b/ and "pat" becomes "bat." Change /b/ to /m/ and "bat" becomes "mat." English has approximately 44 phonemes despite having only 26 letters, which is one of the first structural surprises that confronts an EL. Spanish uses roughly 25 phonemes. Mandarin uses about 21 initial consonants and 35 finals organized by tone. The mismatch between the number of phonemes and the number of letters is a core source of difficulty for readers of English.
The CTEL distinguishes phonology (sound system rules) from phonetics (physical production of sounds). A phoneme is defined by its function: it changes meaning. Phones (sounds) that do not change meaning in a given language are allophones. Knowing this distinction helps you answer questions about why two sounds that seem different to a native speaker are treated as the same sound by an EL whose language does not distinguish them.
(B) The English Phoneme Inventory
English consonants include stops (/p/, /b/, /t/, /d/, /k/, /g/), fricatives (/f/, /v/, /s/, /z/, /sh/, /zh/, /h/, /th/ voiced and voiceless), affricates (/ch/, /j/), nasals (/m/, /n/, /ng/), liquids (/l/, /r/), and glides (/w/, /y/). English vowels span a wide range: short vowels (/ae/ as in "cat," /eh/ as in "bed," /ih/ as in "bit," /aw/ as in "hot," /uh/ as in "but"), long vowels (/ay/, /ee/, /ie/, /oh/, /yoo/), and diphthongs (vowels that glide from one position to another: /oi/ in "boy," /ow/ in "cow," /er/ in "bird"). Diphthongs are particularly tricky because they involve a movement of the tongue during the vowel, and many languages do not have them.
| Sound Category | Examples | Key for ELs |
|---|---|---|
| Stops | /p/ /b/ /t/ /d/ /k/ /g/ | Voicing pairs; aspiration in English /p/ /t/ /k/ at start of stressed syllables |
| Fricatives | /f/ /v/ /s/ /z/ /sh/ /zh/ /th/ | Th sounds do not exist in most world languages |
| Affricates | /ch/ /j/ | Spanish conflates /sh/ and /ch/; this affects spelling |
| Short Vowels | /ae/ /eh/ /ih/ /aw/ /uh/ | English has many more vowel distinctions than most languages |
| Diphthongs | /oi/ /ow/ /er/ | Gliding vowels unfamiliar to speakers of syllable-timed languages |
(2) Segmental and Suprasegmental Features
(A) Segmental Features: Individual Phonemes and L1 Transfer
Segmental features are the individual phonemes in a word. When analyzing EL pronunciation errors, your first question should be: "Does my student's first language have this phoneme?" If the answer is no, the student will tend to substitute the nearest sound from their L1. This is called phonological transfer or L1 interference, and it is predictable once you know the relevant L1 sound system.
A powerful pedagogical tool is the minimal pair: two words that differ by exactly one phoneme (ship/chip, bat/bad, bit/beat). Minimal pair practice forces students to attend to the single phoneme that changes meaning, which is precisely the perceptual discrimination skill they need.
(B) Suprasegmental Features: Intonation, Pitch, Stress, Rhythm, and Modulation
Suprasegmental features operate above the level of the individual phoneme. They include intonation, pitch, stress, rhythm, and modulation. Even when an EL produces every phoneme correctly, missing suprasegmental patterns can lead to miscommunication or to being perceived as abrupt, rude, or uncertain.
Intonation refers to the rising and falling patterns of pitch across an utterance. In English, falling intonation at the end of a sentence signals completion and is used for statements and wh-questions ("Where are you going?"). Rising intonation signals uncertainty or incompleteness and is used for yes-no questions ("Are you ready?"). This is not universal: in some languages, all questions use falling intonation.
Pitch is the frequency of vocal cord vibration, perceived as high or low. In tonal languages like Mandarin, Cantonese, and Vietnamese, pitch is segmental: it is part of the word and changes lexical meaning. In English, pitch is suprasegmental: it conveys emotion, emphasis, or pragmatic meaning but does not change which word is being said. This is a major conceptual shift for ELs from tonal language backgrounds.
Stress operates at two levels. Word stress places emphasis on one syllable within a word: "PRE-sent" (noun) vs. "pre-SENT" (verb). Many ELs apply L1 stress rules to English words, leading to intelligibility problems. Sentence stress highlights the most important word in an utterance. "I didn't take YOUR book" implies someone else's book was taken. "I didn't TAKE your book" implies some other action occurred. These shifts in sentence stress change meaning dramatically in English.
Rhythm is where English diverges most sharply from many other languages. English is a stress-timed language: stressed syllables occur at roughly equal intervals, and unstressed syllables are compressed (shortened, reduced to schwa, or deleted). Spanish, French, Japanese, and Mandarin are syllable-timed languages: each syllable gets roughly equal time. ELs from syllable-timed backgrounds often sound choppy in English because they give equal weight to every syllable, and they struggle to understand fast speech because they are not expecting compressed unstressed syllables.
Modulation refers to variations in vocal quality, pace, and pitch used to express emotion, emphasis, attitude, or engagement. A teacher might modulate their voice to signal excitement about a topic, to indicate sarcasm, or to hold attention. ELs may not recognize these modulation patterns as meaningful, and they may not yet know how to modulate their own English speech to match the context.
Ms. Reyes is teaching 4th grade and notices that her student Mei, a Cantonese speaker, reads aloud with each syllable getting equal emphasis. Mei says "I want to go to the store" with every word equally stressed. Ms. Reyes identifies this as syllable-timing transfer. She models the contracted, reduced-stress version ("I wanna go t'the store") and uses a rubber band activity where students stretch the band on stressed syllables and let it relax on unstressed ones. This directly targets the stress-timing feature of English prosody.
Test takers often confuse pitch and intonation. Pitch is a physical property of a sound (how high or low it is). Intonation is the pattern of pitch changes across an utterance that serves a communicative function. You could say pitch is the raw material and intonation is the pattern made from that material. On the CTEL, intonation questions will ask about the communicative function (question vs. statement, certainty vs. uncertainty); pitch questions may refer to tonal languages specifically.
(3) Morphology: The Structure of Words
(A) What Morphology Studies
Morphology is the branch of linguistics that examines how words are formed and structured. The basic unit of morphology is the morpheme: the smallest unit of language that carries meaning or grammatical function. Unlike a phoneme, a morpheme has meaning. The word "cats" contains two morphemes: "cat" (an animal) and "-s" (plural). The word "untouchable" contains three: "un-" (not), "touch" (physical contact), and "-able" (capable of being).
Understanding morphology matters enormously for ELD instruction because it gives you a systematic way to grow vocabulary. A student who learns that "vis" means to see can unlock "visible," "invisible," "vision," "visual," "visionary," "supervise," "revise," and dozens more. That is morphological analysis as a vocabulary strategy, and it is highly effective for academic language development.
(B) Free and Bound Morphemes
The first major distinction in morphology is between free and bound morphemes. A free morpheme can stand alone as a word: "cat," "run," "happy," "school," "blue." A bound morpheme cannot stand alone; it must be attached to another morpheme to function: "-ness" (happiness), "pre-" (preview), "-ing" (running), "un-" (unhappy). All prefixes and suffixes are bound morphemes. All roots that cannot function as words on their own are also bound morphemes ("struct" in "construct" cannot stand alone in modern English, though it has Latin origins).
(C) Derivational Morphology
Derivational morphology creates new words, often changing the part of speech. This is the type of word formation that drives academic vocabulary growth. When you add "-er" to the verb "teach," you get the noun "teacher." When you add "-tion" to the verb "educate," you get the noun "education." When you add "-ful" to the noun "care," you get the adjective "careful." When you add "-ly" to "careful," you get the adverb "carefully."
Common derivational prefixes and their meanings: "un-" (not: unhappy, uncertain); "re-" (again: rewrite, reassess); "pre-" (before: preview, preschool); "dis-" (apart/not: disagree, disconnect); "mis-" (wrongly: misunderstand, misplace); "over-" (too much: overuse, overstep); "under-" (too little: underperform, underserved); "inter-" (between: interact, intermediate); "trans-" (across: transfer, translate).
Common derivational suffixes and their meanings and word class effects: "-tion/-sion" (action or state: instruction, discussion; verb to noun); "-ness" (state or quality: happiness, darkness; adjective to noun); "-ful" (full of: careful, meaningful; noun to adjective); "-less" (without: careless, meaningless; noun to adjective); "-ly" (in a manner of: quickly, carefully; adjective to adverb); "-able/-ible" (capable of being: readable, visible; verb to adjective); "-er/-or" (one who: teacher, instructor; verb to noun); "-ist" (one who practices: scientist, linguist; noun to noun).
For EL vocabulary instruction, derivational morphology is a high-leverage strategy. Teach the root, then build a word family. From "struct" (to build): construct, construction, constructive, destructive, instruct, instruction, instructor, structure. A student who understands the root has a head start on all members of the family.
Mr. Chen is teaching a 7th grade science unit on ecosystems. He introduces the word "biosphere" and uses derivational morphology to build vocabulary. He writes "bio" on the board and asks what students know: biology, biography, biome, biotic. Then he adds "sphere" and asks what that root means: hemisphere, atmosphere, stratosphere. Students quickly construct the definition of biosphere from its parts. Mr. Chen then shows the word family for "bio": biodiversity, biodegradable, biofuel. This is morphological analysis as an explicit vocabulary strategy, directly applicable to the CTEL content standards.
(D) Inflectional Morphology
Inflectional morphology changes the grammatical form of a word without creating a new word or changing its part of speech. English has exactly eight inflectional morphemes. Every English teacher and CTEL candidate should know all eight.
| Inflectional Morpheme | Function | Example | EL Challenge |
|---|---|---|---|
| -s (plural) | Marks noun plural | cat/cats | Mandarin has no plural marker; omission is common |
| -'s (possessive) | Marks noun possession | Maria's book | Many languages use word order instead of a suffix for possession |
| -s (3rd person singular) | Marks present tense agreement | She runs | Highly marked error; redundant with subject pronoun already present |
| -ed (past tense) | Marks simple past | walked | Irregular verbs do not follow -ed pattern; many languages use time words, not verb marking |
| -ing (present participle) | Marks ongoing action | walking | Most ELs acquire -ing early; used with auxiliary "be" |
| -en (past participle) | Marks perfect aspect or passive | written, eaten | Irregular past participles are not predictable from -en ending |
| -er (comparative) | Marks comparison of adjectives | taller, faster | Rule for when to use -er vs. "more" is complex (one vs. two syllables) |
| -est (superlative) | Marks the extreme degree | tallest, fastest | Same issue as comparative; irregular forms (best, worst, most) |
A critical contrast: inflectional morphology changes grammatical form only, not word class. "Walk" remains a verb whether you add "-ed," "-ing," or "-s." Derivational morphology can change word class ("walk" becomes the noun "walker"). On the CTEL, expect questions that ask you to distinguish these two types.
Many candidates confuse derivational and inflectional morphology. Here is the clearest way to keep them apart: inflectional morphemes are closed class (there are exactly 8 in English and no new ones are added), they never change word class, and they always come at the end of a word after any derivational suffixes. Derivational morphemes are open class (new ones can be borrowed), they often change word class, and they can appear as prefixes or suffixes. If a suffix changes the part of speech, it is derivational, not inflectional.
(4) Greek and Latin Roots in English Vocabulary
(A) Why Roots Matter for ELs
Approximately 60% of English vocabulary has Latin or Greek roots, and in academic and technical domains (science, math, social studies, law, medicine), that figure climbs to 90% or higher. This matters for ELs in two ways. First, students who know common roots can analyze unfamiliar academic words by breaking them into parts. Second, many roots create cognates: words that share a common ancestor and look and mean similar things across languages. For Spanish speakers, this is an enormous advantage because Spanish and English share thousands of Latin-derived cognates.
| Root | Meaning | English Words | Spanish Cognate |
|---|---|---|---|
| graph (Greek) | write, draw | graph, biography, photography, paragraph | grafico, parrafo |
| bio (Greek) | life | biology, biography, biome, biotic | biologia, biografia |
| geo (Greek) | earth | geography, geology, geometry, geothermal | geografia, geometria |
| chron (Greek) | time | chronology, chronicle, synchronize, anachronism | cronologia, cronica |
| port (Latin) | carry | transport, import, export, portable, report | transportar, importar, exportar |
| dict (Latin) | say, tell | dictate, predict, verdict, contradict, dictionary | dictar, predecir, diccionario |
| struct (Latin) | build | construct, instruct, structure, destroy, obstruct | construir, instruccion, estructura |
| spec/spect (Latin) | see, look | inspect, spectator, perspective, spectacular | inspeccionar, espectador, perspectiva |
| aud (Latin) | hear | auditory, audience, audible, audiovisual | auditorio, audiencia, audible |
| vis (Latin) | see | visible, visual, invisible, vision, supervise | visible, visual, invisible, vision |
(B) True Cognates and False Cognates
A true cognate is a word in two languages that shares a common etymological root and has a similar form and meaning. English "communication" and Spanish "comunicacion" are true cognates. Both derive from Latin "communicare." For ELs who speak a Romance language, true cognates are a free vocabulary gift, and you should actively teach students to use cognate knowledge as a reading strategy.
A false cognate (also called a "false friend") is a word that looks similar across languages but has a different meaning. These are traps. The Spanish word "embarazada" means pregnant, not embarrassed. "Sensible" in Spanish means sensitive, not sensible. "Actual" in Spanish means current or present-day, not actual (real). "Asistir" in Spanish means to attend, not to assist. Explicit instruction on false cognates prevents the kind of semantic confusion that makes academic reading difficult for ELs with cognate-language backgrounds.
CTEL questions about cognates typically have you identify an instructional strategy or explain the difference between true and false cognates. Remember: true cognates accelerate vocabulary acquisition for Romance language speakers; false cognates must be explicitly flagged to prevent transfer errors. The exam may present a student error and ask you to identify the source, in which case recognizing a false cognate explanation will earn you the point.
(5) Compound Words
(A) Formation and Types
Compound words are formed by combining two or more free morphemes into a single lexical item. The compound typically takes on a new or specialized meaning that goes beyond the simple sum of its parts. "Butterfly" is not a fly made of butter. "Deadline" was not always metaphorical. This semantic drift makes compounds tricky for ELs who try to decode them compositionally.
English compounds come in three orthographic forms: closed compounds (written as one word: sunlight, football, bookstore, notebook, keyboard); hyphenated compounds (written with a hyphen: well-being, mother-in-law, self-aware, twenty-one); and open compounds (written as two separate words: post office, high school, ice cream, living room). The rules governing which form to use are not systematic, which creates spelling uncertainty even for native speakers.
Grammatically, compounds can function as nouns (bookstore, toothpaste), verbs (babysit, sleepwalk), or adjectives (heartfelt, homesick). Understanding the grammatical function helps ELs use compounds in syntactically appropriate ways.
Cross-linguistically, compounding works differently. German uses closed compounding extensively (Schadenfreude, Kindergarten). Mandarin compounds two characters regularly. However, the semantic relationship between the two elements and the orthographic conventions differ substantially from English. Explicit instruction on compound word recognition, especially the fact that the meaning may not be compositional, is warranted for ELs.
(6) Instructional Strategies for Phonics, Decoding, Spelling, and Vocabulary
(A) Systematic Phonics Instruction
Systematic phonics instruction means teaching the correspondences between phonemes and graphemes in an explicit, sequenced, and cumulative manner. You introduce simple, regular consonant-vowel-consonant (CVC) patterns first, then consonant blends and digraphs, then long vowel patterns, and so on. For ELs, systematic phonics has an additional dimension: you must first check whether the student can perceive the phoneme being taught, because if the phoneme does not exist in their L1, they cannot hear it reliably and therefore cannot connect it to a grapheme.
Before teaching the phoneme-grapheme correspondence for /sh/, for example, you might do phonemic awareness work to ensure Spanish-speaking students can distinguish /sh/ from /ch/. Use minimal pairs, mouth-position mirrors, explicit articulation instruction, and partner practice before adding the grapheme layer.
(B) Decoding and Syllabication
Decoding is the process of converting printed letters into spoken sounds using phoneme-grapheme correspondences. For ELs who are literate in their L1, decoding transfers to varying degrees depending on how similar the L1 orthography is to English. Spanish speakers who are literate in Spanish already understand the concept that letters represent sounds; the transfer is positive. Students who are literate in logographic systems (Chinese characters) or abjads (Arabic, Hebrew, which write primarily consonants) face a more substantial conceptual adjustment.
Syllabication (breaking words into syllables) supports decoding longer, multisyllabic words. Teach the six basic syllable types in English: closed (CVC), open (CV), silent-e (CVCe), vowel team (CVVC), r-controlled, and consonant-le. Each type has a predictable vowel sound pattern. ELs benefit from explicit syllabication practice because it reduces multisyllabic words to manageable phonetic chunks.
(C) Morphological Analysis as a Vocabulary Strategy
Morphological analysis means breaking a word into its morphemes to determine its meaning. This is a high-leverage strategy for academic vocabulary because academic words are frequently polysyllabic and contain Latin or Greek roots with derivational affixes. Teach students a three-step process: (1) identify the root and determine its meaning; (2) identify any prefixes and suffixes and determine their meanings; (3) compose a definition from the parts and check it against the context.
(D) Word Sorting
Word sorts are versatile instructional tools that develop both phonological and morphological awareness. In an open sort, students categorize words by any principle they choose and must articulate the rule. In a closed sort, the teacher provides the categories. You can sort by initial phoneme (phonological awareness), by vowel pattern (phonics), by suffix (-tion words vs. -ment words), by root (all "vis" words together), or by word family. Word sorts are especially valuable for ELs because they require students to notice the linguistic features that distinguish categories, which deepens metalinguistic awareness.
A frequent error in CTEL exam responses is treating spelling instruction as separate from phonics and morphology. Spelling is the productive (encoding) side of the same coin as decoding. Morphological analysis improves spelling because it explains why "sign" and "signal" are spelled with a "g" (from Latin "signum"), even though the "g" is silent in "sign." When students understand that spelling preserves morphological relationships, they can apply rules rather than memorizing every word as an exception.
When the CTEL asks which strategy best supports EL vocabulary development in academic language, morphological analysis (teaching roots and affixes) is almost always the strongest answer compared to looking up words in a dictionary or using context clues alone. Context clues support comprehension but do not build systematic word knowledge. Root instruction builds a generative framework that applies to hundreds of words, which is why it is specifically emphasized in the CTEL framework.
Quick Reference Card
| Phoneme | Smallest sound unit that changes meaning; English has ~44 phonemes with only 26 letters |
| Suprasegmentals | Intonation, pitch, stress, rhythm, modulation; English is stress-timed (vs. syllable-timed Spanish, French, Mandarin) |
| Morpheme | Smallest meaningful unit; free (stands alone) vs. bound (must attach) |
| Inflectional (8 total) | Changes grammatical form only, never word class; closed set: -s, -'s, -s (3rd person), -ed, -ing, -en, -er, -est |
| Derivational | Creates new words, often changes word class (teach + -er = teacher); open set of prefixes and suffixes |
| Greek/Latin roots | 60% of English vocabulary; 90% of academic vocab; key roots: graph, bio, geo, chron, port, dict, struct, spec, aud, vis |
| True vs. false cognates | True: same root, similar form and meaning (education/educacion); false: similar form, different meaning (embarazada = pregnant, not embarrassed) |
| Key strategy | Morphological analysis: find root, analyze affixes, check context; builds generative vocabulary knowledge |