Question tags are short questions added to the end of statements to make them interrogative. Positive statements are followed by negative tags like "He isn't, is he?" while negative statements use positive tags like "He doesn't, does he?". To form a question tag, the statement and tag are separated by a comma and the tag uses the opposite auxiliary verb from the statement, keeping the same tense between the two.

1. 1.what is question tag?
A tag Question is a short question added to the end of
positive or negative statement.
For example-
He isn’t
Is, he?
He doesn’t
does,he?
He won’t
Will, he?
He can’t
can, he?
2 how do you form a question tag?
Normally a positive statements followed by a negative tag
and negative statement is followed by a positive tag.
For example:-
In English
+ -
You’re aren’t you?
In German

2. + -
Are you? You’re not
The statement and the tag are always separated by
comma.
Treat any statements with nothing nobody etc like
negativnsee statement
The verb in the statement should be the same tense as the
verb in the tag
For example
Present tense
You are a good singer , aren’t you?
Past tense
You didn’t go to work , aren’t you?
Present perfect tense
You have been to London , haven’t you?