Question

The postman did not come today. * can't he? did not he? did he?​

Answer 1

The postman did not come today, did he?

• The given statement is a negative sentence. when we add a question tag, then the statement turns into a question.

• If the sentence is positive then we need to add a negative question tag whereas if the sentence is negative then we need to add a positive question tag.

For example:  

Positive sentences with negative question tags:

He is Indian, isn't he?

It was hot yesterday, wasn't it?

They live in Japan, don't they?

Negative sentences with positive tags:

They are not late, are they?

He is not an Indian, is he?

He can't speak Spanish, can he?

Answer 2

Answer:

The postman did not come today, did he ?

• Among the given options 'did he ?' is correct.

• Because positive tail or tag question is used for negative sentence.

• Here negative sentence is : The postman did not come today. And 'did he' is positive tail or tag question.

• Tail Questions are often used in English Language, specially in Conversations.

• For positive sentence negative tail is also used : You are happy, aren't you?