● tag ques·tion
= a question converted from a statement by an appended interrogative formula, e.g. it's nice out, isn't it?
A question tag (also known as question tail) is a grammatical structure in which a declarative or an imperative statement is turned into a question by the addition of an interrogative fragment (the "tag").
For example, in the sentence "You're John, aren't you?", the statement "You're John" is turned into a question by the tag "aren't you".
The term "question tag" is generally preferred by British grammarians, while their American counterparts prefer "tag question".
Tag questions
Tag questions (or question tags) turn a statement into a question. They are often used for checking information that we think we know is true.
Tag questions are made using an auxiliary verb (for example: be or have) and a subject pronoun (for example: I, you, she). Negative question tags are usually contracted: It's warm today, isn't it (not 'is it not')
Usually if the main clause is positive, the question tag is negative, and if the main clause is negative, it's positive.
For example: It's cold (positive), isn't it (negative)? And: It isn't cold (negative), is it (positive)?
If the main clause has an auxiliary verb in it, you use the same verb in the tag question. If there is no auxiliary verb (in the present simple and past simple) use do / does / did (just like when you make a normal question).
There is one weird exception: the question tag after I am is aren't I.
For example: I'm in charge of the food, aren't I?
■ Postive sentences, with negative tags
Present simple 'be'
She's Italian, isn't she?
Present simple other verbs
They live in London, don't they?
Present continuous
We're working tomorrow, aren't we?
Past simple 'be'
It was cold yesterday, wasn't it?
Past simple other verbs
He went to the party last night, didn't he?
Past continuousWe were waiting at the station, weren't we?
Present perfect
They've been to Japan, haven't they?
Present perfect continuous
She's been studying a lot recently, hasn't she?
Past perfect
He had forgotten his wallet, hadn't he?
Past perfect continuous
We'd been working, hadn't we?
Future simple
She'll come at six, won't she?
Future continuous
They'll be arriving soon, won't they?
Future perfect
They'll have finished before nine, won't they?
Future perfect continuous
She'll have been cooking all day, won't she?
Modals
He can help, can't he?
Modals
John must stay, mustn't he?
■ Negative sentences, with positive tags
Present simple 'be'
We aren't late, are we?
Present simple other verbs
She doesn't have any children, does she?
Present continuous
The bus isn't coming, is it?
Past simple 'be'
She wasn't at home yesterday, was she?
Past simple other verbs
They didn't go out last Sunday, did they?
Past continuous
You weren't sleeping, were you?
Present perfect
She hasn't eaten all the cake, has she?
Present perfect continuous
He hasn't been running in this weather, has he?
Past perfect
We hadn't been to London before, had we?
Past perfect continuous
You hadn't been sleeping, had you?
Future simple
They won't be late, will they?
Future continuous
He won't be studying tonight, will he?
Future perfect
She won't have left work before six, will she?
Future perfect continuous
He won't have been travelling all day, will he?
Modals
She can't speak Arabic, can she?
Modals
They mustn't come early, must they?
Try an exercise about tag questions with the present simple here
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