Module 1 (Phonetics & Phonology) should be completed before beginning Module 2.
← Lecture 1.4 — IPA and Dictionary UsageModule 1 established the sound system of English — the 44 phonemes, the organs that produce them, and the suprasegmental features that give speech its rhythm and meaning. Module 2 now turns to a different but equally fundamental dimension of language: grammar — the structural system that governs how words are organised into meaningful sentences (Biber et al., 2021, p. 3).
The starting point for any study of grammar is the word class — sometimes called a part of speech. Every word in English belongs to a class that determines how it behaves grammatically: where it can appear in a sentence, what forms it can take, and what kind of meaning it contributes (Huddleston & Pullum, 2019, p. 17). A student who cannot identify word classes cannot diagnose or correct grammatical errors in their own writing — a critical skill in academic and professional contexts (Yule, 2020, p. 71).
Open classes are called "open" because new words are continuously added to them as language evolves. They carry the primary lexical and referential meaning of sentences (Crystal, 2019, p. 84). English has four major open classes:
| Word Class | Definition | Examples | Test |
|---|---|---|---|
| Noun | Names a person, place, thing, concept, or idea. Can be preceded by a determiner (the, a) (Yule, 2020, p. 72). | student, university, justice, democracy, Lagos | Can follow the: the student ✓ |
| Verb | Expresses an action, event, process, or state. Changes form to indicate tense, aspect, and agreement (Biber et al., 2021, p. 68). | write, analyse, become, present, conduct | Can follow will: will write ✓ |
| Adjective | Modifies a noun, attributing a quality, quantity, or characteristic to it (Huddleston & Pullum, 2019, p. 52). | academic, comprehensive, critical, formal, precise | Fits: very __ : very academic ✓ |
| Adverb | Modifies a verb, adjective, another adverb, or an entire clause, typically expressing manner, time, degree, or frequency (Crystal, 2019, p. 92). | quickly, thoroughly, however, therefore, very | Modifies the verb: writes clearly ✓ |
Academic Note: New words entering English almost always join one of the open classes — especially nouns and verbs. Words like googling (verb), selfie (noun), and viral (adjective) are recent additions. Closed classes, by contrast, have not gained significant new members in centuries (Biber et al., 2021, p. 57).
Closed classes contain a fixed, limited set of words that serve primarily grammatical — rather than lexical — functions. They bind the open-class words together into coherent sentences (Quirk et al., 2018, p. 67). While individual members are few, they are among the most frequently used words in the language.
| Word Class | Definition | Common Members |
|---|---|---|
| Pronoun | Substitutes for a noun or noun phrase to avoid repetition (Yule, 2020, p. 76). | I, you, he, she, it, we, they, who, which, this, that |
| Determiner | Introduces a noun phrase, specifying reference or quantity (Huddleston & Pullum, 2019, p. 60). | the, a, an, this, that, these, those, my, your, every, some |
| Preposition | Shows the relationship between a noun/pronoun and another element in the sentence (Crystal, 2019, p. 97). | in, on, at, of, by, for, with, through, between, during |
| Conjunction | Joins words, phrases, or clauses. Co-ordinating conjunctions join equals; subordinating conjunctions introduce dependent clauses (Biber et al., 2021, p. 80). | and, but, or, nor, yet, so, for, because, although, when, if |
| Auxiliary Verb | Helps the main verb express tense, aspect, modality, or voice (Quirk et al., 2018, p. 74). | be, have, do, will, would, shall, should, may, might, must, can |
One of the most important and frequently misunderstood features of English grammar is functional shift — also called conversion or zero derivation. This is the process by which a word moves from one word class to another without any change in its form (Bauer et al., 2018, p. 143). The word's class is determined entirely by its function in the sentence — not by its spelling or sound (Huddleston & Pullum, 2019, p. 22).
The grammatical class of a word can only be determined by studying its role in the sentence — not by looking at the word in isolation. This principle is foundational to accurate grammatical analysis (Biber et al., 2021, p. 62).
The passage below is drawn from a model academic abstract. Identify the word class of each underlined word, giving a one-sentence justification for each answer (Quirk et al., 2018, p. 80).
Read the passage. For each numbered word, state its word class and explain how its function in the sentence determines your answer.
"The (1)rapid expansion of digital communication has (2)fundamentally altered the way (3)students engage with (4)academic texts. (5)However, many (6)lack the critical (7)literacy skills (8)necessary to evaluate sources (9)effectively. This study (10)examines the implications for tertiary education."
Word classes are not merely a labelling exercise — they are the analytical framework through which grammar is understood and applied. Knowing that a word is a noun tells you it can be the subject of a clause, can be pluralised, and can be preceded by a determiner. Knowing that a word is an adverb tells you it can be moved to different positions in the sentence without changing core meaning (Yule, 2020, p. 78).
The concept of functional shift is particularly important in academic writing, where the same word may appear as a noun in one sentence and a verb in the next. Misidentifying the class leads to errors in agreement, tense, and sentence structure — the precise errors this module is designed to eliminate (Huddleston & Pullum, 2019, p. 25).
Lecture 2.1 — The Building Blocks: Word Classes
Which of the following best describes an "open" word class?
[1 mark]
Define the term word class and explain, with examples, why the same word can belong to different classes depending on context.
[2 marks]
Identify the word class of each underlined word and justify your answer in one sentence each: "The committee will formally present its final report tomorrow."
[5 marks — 1 per word]
Which sentence demonstrates a functional shift of the word water from noun to verb?
[1 mark]
Distinguish between co-ordinating conjunctions and subordinating conjunctions. Give three examples of each and write one original sentence using each type.
[2 marks]
In the sentence "The poor deserve better government support," the word poor functions as:
[1 mark]
List the five closed word classes covered in this lecture. For each, give three examples of actual words that belong to it and explain what grammatical function the class performs.
[3 marks]
Explain the concept of functional shift. Using the word report, write two sentences — one in which it functions as a noun and one in which it functions as a verb. Underline the word and label its class in each sentence.
[2 marks]
Which of the following words is an auxiliary verb?
[1 mark]
In a paragraph of 6–8 sentences, explain why the ability to identify word classes is described as "foundational" to grammatical accuracy in academic writing. Use specific examples of errors that arise when word classes are misidentified.
[2 marks]
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