Question tags are the short questions that we put on the end of sentences – particularly in spoken English. There are lots of different question tags but the rules are not difficult to learn.
反意疑问句（也叫附加疑问句）是我们放在句子结尾的一个短问句，特别是在口语里。有很多种不同类型的反意疑问句，但是其规则并不难学。

Positive/negative
肯定或否定

If the main part of the sentence is positive, the question tag is negative ….
如果主句是肯定的，那么反意疑问句就是否定的……
• He’s a doctor, isn’t he?
• You work in a bank, don’t you?
... and if the main part of the sentence is negative, the question tag is positive.
而如果主句是否定的，那么反意疑问句就是肯定的。
• You haven’t met him, have you?
• She isn’t coming, is she?

With auxiliary verbs
带助动词的

The question tag uses the same verb as the main part of the sentence. If this is an auxiliary verb (‘have’, ‘be’) then the question tag is made with the auxiliary verb.
反意疑问句用主句部分的同一个动词来形成。如果主句里有助动词例如have或者be，那么反意疑问句就用这些助动词来充当动词。
• They’ve gone away for a few days, haven’t they?
• They weren’t here, were they?
• He had met him before, hadn’t he?
• This isn’t working, is it?

Without auxiliary verbs
不带助动词的

If the main part of the sentence doesn’t have an auxiliary verb, the question tag uses an appropriate form of ‘do’.
如果主句部分没有助动词，反意疑问句就用do的适当格式充当动词。
• I said that, didn’t I?
• You don’t recognise me, do you?
• She eats meat, doesn’t she?

With modal verbs
带情态动词的

If there is a modal verb in the main part of the sentence the question tag uses the same modal verb.
如果主句里有情态动词，反意疑问句就用同一个情态动词。

• They couldn’t hear me, could they?
• You won’t tell anyone, will you?

With ‘I am’
带I am的

Be careful with question tags with sentences that start ‘I am’. The question tag for ‘I am’ is ‘aren’t I?’
要注意主句是带I am的句子，反意疑问句是用aren’t I。
• I’m the fastest, aren’t I?

Intonation
声调

Question tags can either be ‘real’ questions where you want to know the answer or simply asking for agreement when we already know the answer.
反意疑问句可以是一个“真实的问题”，当你想知道答案的时候。或者仅仅是我们已经知道答案的一句附和。

If the question tag is a real question we use rising intonation. Our tone of voice rises.
如果反意疑问句是一个真实的问题，我们就用升调来读。
If we already know the answer we use falling intonation. Our tone of voice falls.
如果我们已经知道答案，我们就用降调来读。