Grammar Unlocked

Every word in a sentence plays a specific role. Content words (nouns, verbs, adjectives, adverbs) carry the meaning. Function words (the, a, in, and, but) hold the sentence together. You need to use the right type of word in the right slot — for example, you can't put an adjective where a verb belongs.

Every sentence in English follows one of a small set of basic patterns. The pattern depends on the type of verb you use. Transitive verbs need an object (someone receiving the action). Intransitive verbs don't. Linking verbs need a complement (a word that describes or renames the subject). If your sentence is missing a required part, or has the wrong part in the wrong slot, it breaks the pattern.

Every sentence has two main parts: the subject (who or what the sentence is about) and the predicate (what the subject does or is). The verb in the predicate must agree with the subject in number — singular subject gets a singular verb, plural subject gets a plural verb. This is called subject-verb agreement.

A phrasal verb is a verb made up of two (sometimes three) words — a verb plus a small word called a particle (like up, out, off, down, in). Together they create a meaning that's different from the verb alone. The particle is part of the verb, not a preposition. Common errors include separating the particle from the verb when you shouldn't, or confusing the particle with a preposition.

In English, when you form a question or a negative statement with most verbs, you need the helper verb do / does / did. This is called "do support." The main verb stays in its base form (no -s, no -ed) when "do" is present, because "do" carries the tense and agreement instead.

In active voice, the subject of the sentence does the action: The dog bit the man. In passive voice, the subject receives the action: The man was bitten by the dog. Active voice is almost always stronger, clearer, and more direct. Use passive voice only when the person doing the action is unknown, unimportant, or when you deliberately want to shift focus to the receiver.

The word "which" should refer to a specific, single noun — not to a whole idea or situation. When "which" refers to an entire clause or a vague general idea, your reader won't know exactly what it's pointing to. This is called a broad reference error.

An absolute phrase is a descriptive group of words that adds detail to the whole sentence — it has its own subject and a participle (an -ing or -ed verb form), but it is not a complete sentence on its own. It must be separated from the main clause with a comma. Absolute phrases are a powerful writing tool that add vivid detail.

When two adjectives both independently describe a noun, put a comma between them. These are called coordinate adjectives. But when one adjective describes the other adjective + noun as a unit, no comma is needed. These are called cumulative adjectives. There are two easy tests to figure out which type you have.

The way you talk with your friends is different from the way you write a school essay — and that's completely normal. Every language has different registers (levels of formality). In academic writing, you are expected to use Standard Academic English: complete sentences, formal vocabulary, no slang, no contractions, and no casual phrasing. This isn't about one way of speaking being "better" — it's about using the right tool for the right situation.

Avoid language that assumes gender or excludes groups of people. The most common issue is using "he" as a default pronoun when referring to a person whose gender is unknown. Modern academic writing has several accepted solutions.

In English, the end of a sentence is the position of greatest emphasis. Readers naturally stress the last idea they read. If you bury your most important or surprising information in the middle of a sentence, it loses its punch. One powerful technique for controlling emphasis is the cleft sentence: starting with "It was..." or "It is..." to push the key idea to the end.

Words like however, furthermore, therefore, on the other hand, in addition, and surprisingly are called transition words (or metadiscourse markers). They help your reader follow your logic. When they appear at the beginning of a sentence or interrupt the middle of one, they must be set off with commas.