Difficulty: Foundational | Prerequisites: None
This cluster covers the building blocks of English sentences: the four essential parts of speech, how verb tenses work (including tricky past forms and irregular verbs), the relationship between subjects and verbs, subject-verb agreement, apostrophe rules, pronoun types and usage, and pronoun-antecedent agreement. These are the grammar fundamentals that every other writing skill in the course builds on. If you skipped the first few weeks or grammar feels shaky, start here.
Every English sentence is built from parts of speech (verbs, nouns, pronouns, adjectives) that must agree in number and tense. Verbs change form depending on when the action happens, and subjects must match their verbs in number. Apostrophes mark contractions and possession (but never possessive pronouns), and pronouns must clearly match the nouns they replace in both number and gender.
Grammar
The set of rules that govern a language.
In simple terms, grammar is the rulebook for how words fit together so people understand each other.
Parts of speech
The jobs or functions that words perform in a sentence.
Think of it as each word having a role to play, like actors in a scene.
Verb
A word that defines actions or indicates a state of being.
In simple terms, verbs tell you what is happening ("run," "think") or what something is ("is," "was").
Noun
A word that names a person, place, thing, or idea.
Think of it as the answer to "who?" or "what?" in a sentence.
Pronoun
A word that takes the place of a noun in a sentence.
In simple terms, pronouns (he, she, they, it) are stand-ins so you do not have to repeat the same noun over and over.
Adjective
A word that modifies a noun, adding more detail about it.
Think of it as a descriptor: "big," "red," "difficult" all tell you more about the noun they sit beside.
Present tense verbs
Verbs that indicate something is happening now or happens habitually.
In simple terms, "she walks" covers both right now and always.
Past tense verbs
Verbs that indicate something happened in the past and is no longer happening.
"She walked" tells you the action is finished.
Future tense verbs
Verbs that indicate something will happen sometime in the future.
"She will walk" points forward in time.
Past participle
A verb tense composed of the past tense of the verb plus "have," "has," or "had."
Think of it as the "have + verb" combo: "I have danced," "she has eaten."
Past perfect tense
A type of past tense that describes something that took place in a more distant past, formed by pairing "had" with a verb.
In simple terms, it separates two past events: "I had printed the paper before the printer broke" makes the timeline clear.
Irregular verbs
Verbs that do not follow the standard "-ed" pattern for past tense.
Think of is/was, sing/sang, drink/drank. You just have to know these by heart.
Subject
Who or what the sentence is about, a noun or pronoun directly connected to the verb.
The subject is the actor: in "The dog barked," the dog is the subject.
Sentence
A group of words that expresses a complete thought and includes a subject and a verb.
Action verb
A verb that conveys a physical action typically involving movement ("run," "dance").
Linking verb
A verb that connects the subject to information about the subject without conveying action.
Think of it as an equals sign: "The day is hot" means the day = hot.
Object
The item acted upon by the subject in a sentence.
In "The boy ate pancakes," pancakes is the object.
Subject-verb agreement
The rule that the subject and verb in a sentence must share the same number (singular or plural) and person.
In simple terms, "the cat jumps" and "the cats jump" both agree. "The cats jumps" does not.
Compound subject
When more than one noun or pronoun serves as the subject of a sentence.
"The dog and cat are friends" has a compound subject.
Apostrophe
A punctuation symbol that indicates possession or is used to form contractions.
In simple terms, it does two jobs: it shows ownership ("the dog's bone") and it marks missing letters in contractions ("don't").
Possessive
Indicates that something in the sentence belongs to something else.
Personal pronoun
English pronouns that identify gender, person, number, and case (he, she, it, they, we, me, him, her).
Antecedent
The word that a pronoun refers to and stands in for.
In "The dog barked because she was hungry," "dog" is the antecedent of "she."
Pronoun-antecedent agreement
Agreement in number and other features of a pronoun and its antecedent.
In simple terms, if the noun is singular, the pronoun replacing it must be singular too.
Verbs tell you what is happening. Always find the verb first when analysing a sentence. Look for the action, and do not forget "be" verbs (am, is, are, was, were, will be).
Nouns name the who or what. Ask "who or what is doing the action?" to find them. Sentences often have more than one noun.
Pronouns replace nouns to avoid repetition. Personal pronouns: he, she, it, they, we. Indefinite pronouns: everyone, someone, nobody, anything. The noun a pronoun replaces is called the antecedent.
Adjectives modify nouns by adding detail. They usually appear right before the noun: "the big rope," "the brown dog."
To identify parts of speech in any sentence: find the verb (the action), then the noun (who is doing it), then check for pronouns (stand-ins for the noun) and adjectives (descriptors near the nouns).
Present tense: "She walks." Describes what is happening now or what happens habitually.
Future tense: "She will walk." Points to something that has not happened yet.
Simple past tense: "She walked." Ended with "-d" or "-ed" for regular verbs.
Past participle: "I have danced." Formed with have/has/had + past tense verb. Three uses: speaking about the past, modifying a noun ("bruised knees"), and forming past perfect.
Past perfect: "I had printed the paper before the printer broke." Uses "had" + verb to separate two past events in time. The "had" event happened further back.
Key rule: all verbs in a sentence should use the same tense. Do not shift from present to past mid-sentence ("I ride my bike and stopped" is wrong).
These do not follow the "-ed" pattern. You must memorise them.
is / was
sing / sang
are / were
drink / drank
swim / swam
fall / fell
When unsure, check a dictionary.
Three common sentence patterns:
Subject + verb: "The boy ate."
Subject + verb + complement: "The boy is hungry."
Subject + verb + object: "The boy ate pancakes."
Sometimes the verb comes before the subject: "On the boy's plate were the pancakes." Compound subjects have more than one actor: "My mum and I are going to the shop."
Subjects and verbs must match in number and person.
Singular subjects take singular verbs: "He jumps," "She flies."
Plural subjects take plural verbs: "They jump," "Birds fly."
For regular verbs, add "-s" for singular third person, drop it for plural.
Irregular verbs do not follow this pattern: singular "is," "was," "has," "does" vs. plural "are," "were," "have," "do."
Even when words, phrases, or clauses separate subject and verb, they must still agree: "All of the cats in the house hide under the bed."
Compound subjects are plural: "The cats and the mouse share dinner."
For contraction: the apostrophe replaces missing letters. "Could not" becomes "couldn't" (the apostrophe sits where the "o" was).
For possession (singular nouns): add apostrophe + s. "The dog's bone."
For possession (plural nouns ending in s): add apostrophe after the existing s. "The dogs' park."
For irregular plurals: add apostrophe + s. "The geese's flight pattern," "the children's toys."
Critical exception: possessive pronouns never take an apostrophe. His, hers, its, theirs, ours, my are already possessive. "Its" (possessive) vs. "it's" (contraction of "it is").
To check: if the word owns something in the sentence, it is possessive and may need an apostrophe. If the word simply indicates plural (more than one), it does not.
Possessive pronouns (my, mine, her, hers, his, its, their, theirs, our, ours): show ownership, never use an apostrophe.
Subject pronouns (I, he, she, it, they, we, who): used as the subject of a sentence. In compound subjects, test by removing the other subject: "The dog and I are going" works because "I am going" works. "The dog and me are going" is wrong because "me am going" makes no sense.
Object pronouns (me, her, him, them, us, whom): used as the object of a verb or preposition. "The teacher brought us doughnuts."
Subject/object pronouns (you, it): can function as either.
Common errors to watch for: using "me" as a subject in compound constructions ("him and me went" should be "he and I went"), and adding apostrophes to possessive pronouns ("her's" should be "hers").
Pronouns must match their antecedent in number and gender.
"My dad ate his cookies." Singular male antecedent, singular male pronoun.
"We went into the classroom and took our seats." Plural antecedent, plural pronoun.
Singular indefinite pronouns (anyone, someone, nobody, everybody, anything, something) take singular verbs and are referred to with singular pronouns.
The roots help: one, body, thing are all singular.
Plural indefinite pronouns: few, several, both.
Students often think "it's" is possessive. It is not. "It's" always means "it is" or "it has." The possessive form is "its" with no apostrophe.
Students assume plural words ending in "s" need an apostrophe. They do not. "The students need help" is plural, not possessive. Only add an apostrophe when the word owns something.
Students mix up tenses mid-sentence without realising it. "I ride my bike and stopped for a drink" switches from present to past. Both verbs need the same tense.
Students treat singular indefinite pronouns as plural. "Everyone" and "nobody" feel like they refer to groups, but they are grammatically singular and take singular verbs: "Everyone is going," not "everyone are going."
⚠️ Subject-verb agreement with irregular verbs (is/are, has/have, does/do) is frequently tested. Know the singular and plural forms cold.
⚠️ Distinguishing possessive pronouns from contractions (its vs. it's, their vs. they're, your vs. you're) appears on nearly every grammar exam.
⚠️ Identifying the correct pronoun case in compound constructions ("The dog and I" as subject, "gave it to him and me" as object) is a classic test question.
⚠️ Pronoun-antecedent agreement with indefinite pronouns: "Everyone should bring his or her book" (singular), not "everyone should bring their book."
⚠️ Past perfect vs. simple past: exam questions may ask you to choose between "I printed" and "I had printed" to clarify the sequence of two past events.
True or false: "The elephants has peanuts" is correct subject-verb agreement. (False. "Elephants" is plural, so the verb should be "have.")
Fill in the blank: In the sentence "Could not" becomes "couldn't," the apostrophe replaces the missing letter ____. ("o")
True or false: Possessive pronouns like "hers" and "its" require an apostrophe. (False. Possessive pronouns never take an apostrophe.)
Fill in the blank: A verb tense composed of "had" plus a past tense verb is called the ____ ____ tense. (Past perfect)
True or false: In "The dog and me went for a walk," the pronoun "me" is used correctly. (False. "Me" is an object pronoun. The correct form is "The dog and I went for a walk.")
Q: What are the four essential parts of speech, and what does each one do?
A: Verbs define actions or states of being. Nouns name a person, place, thing, or idea. Pronouns take the place of nouns. Adjectives modify nouns by adding detail.
Q: What is the difference between simple past tense and past perfect tense?
A: Simple past tense describes something that happened in the past ("I danced"). Past perfect tense uses "had" plus a verb to describe something that happened further back in the past relative to another past event ("I had danced before dinner started"). Past perfect clarifies the sequence of two past events.
Q: How do you form the possessive of a singular noun? Of a plural noun ending in "s"?
A: For a singular noun, add apostrophe + s ("the dog's bone"). For a plural noun already ending in "s," add an apostrophe after the s ("the dogs' park"). For irregular plurals not ending in "s," add apostrophe + s ("the children's toys").
Q: Correct this sentence: "Everyone should bring their notebook to class."
A: "Everyone" is a singular indefinite pronoun. The corrected sentence is: "Everyone should bring his or her notebook to class."
Q: Identify the error: "The cats, who live together, enjoys chasing the mouse."
A: "Cats" is plural, but "enjoys" is singular. The verb should be "enjoy" to agree with the plural subject. Correct: "The cats, who live together, enjoy chasing the mouse."
Q: In the sentence "They gave the ball to he," what is the pronoun error?
A: "He" is a subject pronoun, but it is being used as an object here (receiving the ball). The correct object pronoun is "him": "They gave the ball to him."
This material feeds directly into Sentence Construction (clauses, conjunctions, fragments, run-ons), because you cannot fix a sentence error without identifying the subject, verb, and their agreement first. It also underpins Paragraph Development, where clear grammar keeps supporting sentences readable. If pronoun reference or verb tense is shaky, the reader loses track of who did what and when, which weakens every paragraph you write.
Parts of speech, verb, noun, pronoun, adjective, verb tense, present tense, past tense, future tense, past participle, past perfect, irregular verbs, subject, predicate, subject-verb agreement, number agreement, person agreement, apostrophe, contraction, possessive, possessive pronoun, personal pronoun, subject pronoun, object pronoun, compound subject, linking verb, action verb, antecedent, pronoun-antecedent agreement, indefinite pronoun, pronoun reference, pronoun choice, ENG 18, Foundations of English Composition, Sophia Pathways, grammar basics, sentence building blocks