What is the question tag? Or Question tag (also known as tail question) in English

Question tags (also known as tail question) are short questions at the end of statements.

• confirm that something is true or not, or to encourage a reply from the person we are speaking to.

Question tags (also known as tail question) are formed with the auxiliary or modal verb from the statement and the appropriate subject.

A positive statement is followed by a negative question tag (also known as tail question).

Example: 

1. It is hot today, isn’t it?
2. They are English, aren’t they?

• is or are – positive statement
• isn’t or aren’t – negative question tag

A negative statement is followed by a positive question tag (also known as tail question).

Example:

1. It isn’t cold today, is it?
2. You weren’t happy, were you?

• isn’t or weren’t – negative statement
• is or were - positive question tag

When the verb in the main sentence is in the present simple we form the question tag (also known as tail question) with do and does.

Example:

1. You play the game, don't you?
2. Nisha likes Riya, doesn't she?

If the verb is in the past simple we use did.

Example:

1. She reached home late again, didn’t she?

When the statement contains a word with a negative meaning, the question tag (also known as tail question) needs to be positive.

Example:

1. We never forget our childhood, do we?

Question tag (also known as tail question) Examples:

1. It is hot today, isn’t it?
2. They are English, aren’t they?
3. You weren’t happy, were you?
4. It will be Sunday tomorrow, won’t it?
5. It won’t be 20^th February tomorrow, will it?
6. I shan’t be with you, shall I?
7. You have read Spoken English, haven’t you?
8. You had finished your work, hadn’t you?
9. You couldn’t find the book for me, could you?
10. Mina shouldn’t go to bed late, should she?
11. Ravi must wait till 12 o’clock, mustn’t he?
12. She hasn’t learnt English, has she?
13. You can speak English, can’t you?
14. Great men don’t waste their time, do they?
15. Your brother has a television set, hasn’t he?
16. You should not talk like this, should you?
17. How pleasant it is, isn’t it?
18. She will reach here soon, won’t she?
19. She reached home late again, didn’t she?
20. We never forget our childhood, do we?