RULES TO ADD QUESTION TAG OF VERB 'IS':

A) For positive sentence, the tag will be negative.

B) For negative sentence, the tag will be positive.

C) Use pronouns in the question tag (he, she, it, etc.).

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

SENTENCE 1:
She is a doctor.
(Add a question tag)

ANSWER IS:
She is a doctor, isn't she?

RULES:
In this sentence, verb "is" is positive. So, question tag is negative. The subject "she" is a pronoun. So, "she" is used in the question tag.

SENTENCE 2:
He's a talented artist.
(Add a question tag)

ANSWER IS:
He's a talented artist, isn't he?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "he" is a pronoun. So, "he" is used in the question tag.

SENTENCE 3:
It is raining heavily.
(Add a question tag)

ANSWER IS:
It is raining heavily, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "it" is a pronoun. So, "it" is used in the question tag.

SENTENCE 4:
This is your book.
(Add a question tag)

ANSWER IS:
This is your book, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "this" is replaced by "it" in the question tag.

SENTENCE 5:
He is very tall.
(Add a question tag)

ANSWER IS:
He is very tall, isn't he?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "he" is a pronoun. So, "he" is used in the question tag.

SENTENCE 6:
The room is clean.
(Add a question tag)

ANSWER IS:
The room is clean, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "the room" is replaced by "it" in the question tag.

SENTENCE 7:
That is the final decision.
(Add a question tag)

ANSWER IS:
That is the final decision, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "That" is replaced by "it" in the question tag.

SENTENCE 8:
Your answer is correct.
(Add a question tag)

ANSWER IS:
Your answer is correct, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "Your answer" is replaced by "it" in the question tag.

SENTENCE 9:
The food is ready.
(Add a question tag)

ANSWER IS:
The food is ready, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "the food" is replaced by "it" in the question tag.

SENTENCE 10:
Her bag is on the table.
(Add a question tag)

ANSWER IS:
Her bag is on the table, isn't it?

RULES:
In this sentence, verb "is" is positive. So, negative question tag. The subject "Her bag" is replaced by "it" in the question tag.