Every English sentence is built from the same eight basic word categories. Understanding them makes every other grammar topic — tenses, articles, sentence structure — easier to learn, because you'll recognise why a rule applies.
The 8 parts of speech
| Part of speech | Function | Example |
|---|---|---|
| Noun | Names a person, place, thing, or idea | teacher, city, book, freedom |
| Verb | Expresses an action or state | run, think, is, become |
| Adjective | Describes a noun | happy, blue, difficult |
| Adverb | Describes a verb, adjective, or another adverb | quickly, very, well |
| Pronoun | Replaces a noun | he, she, it, they, this |
| Preposition | Shows a relationship (time, place, direction) | in, on, at, to, from |
| Conjunction | Connects words, phrases, or clauses | and, but, because, although |
| Interjection | Expresses sudden emotion | Wow! Ouch! Oh! |
Nouns: naming things
Nouns can be common (dog, city) or proper (Max, Paris — always capitalised), countable (books, chairs) or uncountable (water, advice, information). Whether a noun is countable affects both articles and verb agreement — see our articles guide.
Verbs: the action or state
Verbs are either action verbs (run, write, eat) or state/stative verbs (know, believe, seem), and this distinction determines whether a verb can be used in continuous ("-ing") forms — stative verbs generally can't: "I am knowing" is incorrect; "I know" is correct.
Adjectives vs. adverbs: a common confusion
| Adjective (describes a noun) | Adverb (describes a verb/action) |
|---|---|
| She is a careful driver. | She drives carefully. |
| He is a quick learner. | He learns quickly. |
| That was a good performance. | She performed well. (irregular — not "goodly") |
Pronouns: standing in for nouns
| Type | Examples |
|---|---|
| Subject pronouns | I, you, he, she, it, we, they |
| Object pronouns | me, you, him, her, it, us, them |
| Possessive pronouns | mine, yours, his, hers, ours, theirs |
Conjunctions: connecting ideas
- Coordinating (joining equal ideas): and, but, or, so, yet — "I was tired, but I finished the report."
- Subordinating (joining a main and dependent idea): because, although, if, when — "I stayed home because I was sick."
Why this matters for other grammar topics
Recognising a word's part of speech is the first step in almost every other grammar rule: knowing a noun is uncountable tells you how to use articles; knowing a verb is stative tells you which tenses it can take; knowing a word is an adverb, not an adjective, tells you where it belongs in a sentence.
Where to go next
Once these categories feel familiar, our Articles guide and Prepositions guide apply this foundation directly. Test your understanding with the Grammar Quiz.
Go deeper into individual word classes: adjectives change form in degrees of comparison (big, bigger, biggest), articles are covered in a, an and the, and helping verbs like can and should in modal verbs.