RULES TO ADD QUESTION TAGS TO IRREGULAR VERBS:

A) Question tags follow helping (auxiliary) verbs, not the main verb type (regular or irregular).

B) So even if a verb is irregular, the tag depends on the tense and helping verb used.

C) We have to read the sentence and correctly identify the invisible helping verb.

D) Always add a comma before the tag, and end the sentence with a question mark.

SENTENCE 11:
He didn't go to the meeting.
(Add a question tag)

ANSWER IS:
He didn't go to the meeting, did he?

RULES:
For negative sentence, positive question tag is used. GO is irregular verb, so, question tag is based on the auxiliary verb DID (past tense).

SENTENCE 12:
They didn't see the message.
(Add a question tag)

ANSWER IS:
They didn't see the message, did they?

RULES:
For negative sentence, positive question tag is used. SEE is irregular verb, so, question tag is based on the auxiliary verb DID (past tense).

SENTENCE 13:
She hasn't spoken to the teacher.
(Add a question tag)

ANSWER IS:
She hasn't spoken to the teacher, has she?

RULES:
For negative sentence, positive question tag is used. Question tag based on the auxiliary verb HAS is used.

SENTENCE 14:
You haven't written your notes.
(Add a question tag)

ANSWER IS:
You haven't written your notes, have you?

RULES:
For negative sentence, positive question tag is used. Question tag based on the auxiliary verb HAVE is used.

SENTENCE 15:
He hadn't drunk any water, had he?
(Add a question tag)

ANSWER IS:
He hadn't drunk any water, had he?

RULES:
For negative sentence, positive question tag is used. Question tag based on the auxiliary verb HAD is used.

SENTENCE 16:
They hadn't broken the rule.
(Add a question tag)

ANSWER IS:
They hadn't broken the rule, had they?

RULES:
For negative sentence, positive question tag is used. The subject "They" is a pronoun. So, "They" is used in the question tag.

SENTENCE 17:
He isn't doing his work, is he?
(Add a question tag)

ANSWER IS:
He isn't doing his work, is he?

RULES:
For negative sentence, positive question tag is used. The subject "He" is a pronoun. So, "He" is used in the question tag.

SENTENCE 18:
She isn't driving today.
(Add a question tag)

ANSWER IS:
She isn't driving today, is she?

RULES:
For negative sentence, positive question tag is used. The subject "She" is a pronoun. So, "She" is used in the question tag.

SENTENCE 19:
They won't have gone by then.
(Add a question tag)

ANSWER IS:
They won't have gone by then, will they?

RULES:
For negative sentence, positive question tag is used. Question tag based on the auxiliary verb WILL is used.

SENTENCE 20:
You won't have done it by tomorrow.
(Add a question tag)

ANSWER IS:
You won't have done it by tomorrow, will you?

RULES:
For negative sentence, positive question tag is used. Question tag based on the auxiliary verb WILL is used.