English grammar · Intermediate
English Sentence Structure
English sentence structure is built on a fixed order, subject, verb, object, and a small set of ways to rearrange it: questions move the auxiliary, negatives add not after it, relative clauses attach extra information to a noun, and devices like inversion, cleft sentences, and ellipsis shift emphasis or cut repetition.
What it is
Because English nouns have almost no case endings, word order does the work that endings do in other languages: The dog bit the man and The man bit the dog contain the same words and mean opposite things. A statement runs subject, verb, then object or complement; almost every other pattern in this section is a controlled departure from that order for a reason, to ask, to deny, to emphasise, or to add.
She has finished the report (statement). Has she finished the report? (question). She hasn't finished the report (negative). It's the report that she hasn't finished (cleft, for emphasis).
How to spot it
Find the main verb and its subject first. Everything else in the sentence is attached to one of them: an object after the verb, a relative clause after a noun, an adverbial at the start or end.
- The woman who called yesterday wants an answer. (relative clause attached to the subject noun)
- Never have I seen such a mess. (inversion after a negative adverbial)
- What I need is a holiday. (cleft sentence putting the focus at the end)
- She can sing and he can too. (ellipsis: the repeated verb is left out)
A clause has its own subject and verb. A sentence has at least one clause; a complex sentence joins two or more with a conjunction (because, although, when) or a relative pronoun (who, which, that).
Sentence Structure Quick Reference
The basic clause patterns
| Pattern | Example | Note |
|---|---|---|
| Subject + verb | The baby slept. | intransitive verb, nothing needed after it |
| Subject + verb + object | She read the letter. | transitive verb |
| Subject + verb + complement | He is a doctor. He seems tired. | linking verb plus noun or adjective |
| Subject + verb + object + object | I gave her the keys. | two-object verb: person first, thing second |
| Subject + verb + object + complement | They painted the door red. | the complement describes the object |
| Auxiliary + subject + verb | Did she read the letter? | question: the auxiliary moves in front |
| Subject + auxiliary + not + verb | She did not read the letter. | negative: not follows the auxiliary |
All 18 sentence structure lessons
The pages here start with the two structures every learner needs from day one, questions and negative sentences, and there is and there are. From there they move through the structures that attach information to a noun (defining and non-defining relative clauses, participle clauses, time clauses) and the structures that manage emphasis and economy at a higher level (cleft sentences, inversion, ellipsis, avoiding repetition). Contrast words and it and there as dummy subjects round out the section.
- Questions: Questions in English are made by moving an auxiliary verb in front of the subject. If the statement has no auxiliary, you add do, does, or did. Yes/no questions start with that auxiliary; wh-questions put a question word (what, where, who, how) in front of it. One word-order rule covers every type, and most learner errors come from breaking it.
- Ellipsis: Ellipsis is the omission of words that are understood from the context, so that a sentence says less than it means and the listener fills the gap. English uses it after and, but, and or, in short answers, after auxiliary verbs, and in comparisons. It is one of the main ways English avoids repetition, and using it naturally is a mark of fluent, advanced English.
- Negative Sentences: A negative sentence says that something is not the case. English builds it by putting not after an auxiliary verb (is not, have not, cannot), and when the sentence has no auxiliary it borrows do, does, or did to hold the not (I do not know, she did not call). Words like never, nobody, and nothing carry a negative on their own, and standard English allows only one negative per clause.
- Relative Clauses: A relative clause is a clause that describes a noun, attached to it with a relative pronoun such as who, which, that, or whose, or a relative adverb such as where or when. A defining relative clause picks out which person or thing you mean (the man who called, the book that I lost) and cannot be removed without changing the meaning. Defining clauses take no commas, allow that, and often drop the pronoun entirely.
- There Is and There Are: There is and there are introduce something that exists or is present, without making that thing the grammatical starting point. There is a dummy subject; the real noun comes after the verb and decides the form: there is a kettle, there are two mugs. The same pattern gives there was and there were in the past, and questions invert it: Is there a kettle? Are there any mugs?
- Cleft Sentences: A cleft sentence splits one simple idea into two clauses so that one piece of information sits in a highlighted slot. The two main patterns are the it-cleft (It was the kettle that whistled) and the wh-cleft or pseudo-cleft (What I heard was a kettle). English uses them to correct, contrast, or delay the new information until the end of the sentence.
- Dates in English: English dates combine an ordinal day, a month name, and a year, and they take the preposition on for a day or a full date, in for a month or a year, and no preposition with last, next, this, and every. British English writes and often says the day first (3 March 2019, the third of March); American English writes the month first (March 3, 2019) and says March third. Months and days of the week take a capital letter.
- How Long: How long asks about duration: the length of a situation, a process, or a wait. With the present perfect it measures a period that started in the past and still holds (How long have you had the kiln?). How long does it take asks about the time a process needs. How long will and how long did cover future and finished periods. It is not the same question as how often, which asks about frequency.
- Participle Clauses: A participle clause is a reduced clause built on an -ing form, a past participle, or having + past participle, used to pack time, reason, result, or condition into a phrase instead of a full finite clause. Walking back from the quay, she noticed... means As she was walking back.... Used carefully, participle clauses make advanced writing denser; used carelessly, they dangle from the wrong subject.
- Contrasting Words and Phrases: Contrasting words and phrases signal that two ideas pull in different directions: a surprise, a limit, or a straight opposition. English has a large set, and they are not interchangeable, because they occupy different grammatical slots. Although and even though are conjunctions that introduce a clause; despite and in spite of take a noun or -ing form; whereas and while set two facts against each other; however, nevertheless, and on the other hand stand between sentences. Choosing the right one is a matter of structure first, then of tone.
- Inversion: Inversion in this sense is the advanced pattern in which a negative or restrictive adverbial takes first position and the auxiliary verb then precedes the subject: Never have I..., Not only did she..., Hardly had we sat down when.... English also inverts after so and neither in short replies (So do I, Neither have we) and in formal conditionals without if (Had I known, Were she here, Should you need help). Ordinary question inversion (Are you ready?) is a different, earlier pattern and is not re-taught here.
- Non-Defining Relative Clauses: A non-defining relative clause adds extra information about a noun that is already identified. It sits between commas (or after a comma at the end of the sentence), it cannot use that, and the relative pronoun cannot be left out. Removing the clause leaves a complete sentence whose meaning is still clear. Defining relative clauses, which identify which one you mean and take no commas, are a separate lesson.
- Wish Sentences: Wish sentences use a past form to talk about a present or past that you want to be different. Wish plus past simple regrets a present state (I wish I had a longer greenhouse). Wish plus past perfect regrets a closed past (I wish I had netted the brassicas). Wish plus would complains about a present action you want to change (I wish the pigeons would leave the seedlings). Two cousins, it's time and would rather, share the same past-for-unreal pattern.
- Time Clauses: A time clause is a clause that says when something happens, introduced by when, as soon as, before, after, until, while, once, or by the time. For a future event, English puts the time clause in the present simple and keeps will in the main clause: I'll cue the oboes when she lowers her baton, not when she will lower. The same conjunctions take past forms when the whole sentence is about the past, and the sequence of tenses has to stay consistent.
- It and There as Dummy Subjects: Dummy it and dummy there fill the subject slot when English needs a subject but the real information comes later. It covers weather, time, distance, cleft focus, and it plus adjective plus to (It's foggy. It's twenty past eight. It's six kilometres to the quarry. It's easy to miss the turning.). There introduces existence or presence (There's a rehearsal at seven.). Neither word points at a thing in those uses; both are empty subjects.
- Although, Even Though, Despite, In Spite Of: Although and even though introduce a full clause (subject plus verb) that goes against the result that follows: Although the tide was out, they launched the dinghy. Despite and in spite of take a noun, a pronoun, or an -ing form, not a clause: Despite the tide, they launched. Even though is a stronger although. The four markers all signal concession; they are not interchangeable, because the slot after them is different.
- Short Forms (Contractions): Short forms, or contractions, squeeze a pronoun or a noun together with an auxiliary or a negative: I'm, she's, they've, don't, isn't, won't. The apostrophe marks the missing letters. They are the normal shape of spoken English and of informal writing. Full forms (I am, they have, do not) belong in careful writing and in some stressed replies.
- Avoiding Repetition: English avoids repeating a noun, a verb, or a whole clause once the listener already has it. Pronouns replace nouns (the barge... it). One and ones replace a countable noun after an adjective (the second one). So, do, and auxiliary verbs stand in for a verb phrase (the first leaked; the second did too). Ellipsis leaves the repeated words out entirely. Together these tools keep sentences short without making them vague.
Sentence Structure FAQs
- What is the basic word order of an English sentence?
- Subject, verb, object: I read books. Adverbials of time and place usually go at the end (I read books at night), and adverbs of frequency go before the main verb (I often read books). This order is rigid compared with most European languages, which is why a sentence with the object first sounds poetic or wrong rather than merely emphatic.
- How do I make a question in English?
- Move the auxiliary verb in front of the subject: She is coming becomes Is she coming? If the statement has no auxiliary, add do, does, or did: She likes tea becomes Does she like tea? A wh-word goes at the very front: Where does she live? Only be as a main verb inverts without do: Is she here?
- What is the difference between a defining and a non-defining relative clause?
- A defining clause tells you which one and cannot be removed: the man who lives next door is a doctor. A non-defining clause adds extra information about something already identified, is set off with commas, and could be dropped: my neighbour, who is a doctor, lives next door. Non-defining clauses never use that and never omit the pronoun.
- What is a cleft sentence?
- A sentence split in two to put emphasis on one part. It was Maria who found the keys stresses Maria; What she found was the keys stresses the keys. Cleft sentences are common in speech, where you cannot use bold type, and in writing when you want the reader to notice one element.
- When does English put the verb before the subject?
- In questions, and in a few other patterns: after negative or restrictive adverbials at the start of a sentence (Never had he seen it, Only then did I understand), in conditionals without if (Had I known, Should you need help), after so and neither (So do I, Neither did she), and in formal descriptions of place (On the hill stood a castle).