RULES TO ADD QUESTION TAG OF VERB 'WAS':

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:
Your phone was ringing a while ago.
(Add a question tag)

ANSWER IS:
Your phone was ringing a while ago, wasn't it?

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

SENTENCE 2:
I was tired last night.
(Add a question tag)

ANSWER IS:
I was tired last night, wasn't I?

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

SENTENCE 3:
The dinner was delicious.
(Add a question tag)

ANSWER IS:
The dinner was delicious, wasn't it?

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

SENTENCE 4:
The weather was perfect for a picnic.
(Add a question tag)

ANSWER IS:
The weather was perfect for a picnic, wasn't it?

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

SENTENCE 5:
Your speech was inspiring.
(Add a question tag)

ANSWER IS:
Your speech was inspiring, wasn't it?

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

SENTENCE 6:
That song was playing on the radio.
(Add a question tag)

ANSWER IS:
That song was playing on the radio, wasn't it?

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

SENTENCE 7:
The traffic was terrible this morning.
(Add a question tag)

ANSWER IS:
The traffic was terrible this morning, wasn't it?

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

SENTENCE 8:
She was a great dancer.
(Add a question tag)

ANSWER IS:
She was a great dancer, wasn't she?

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

SENTENCE 9:
That was your idea.
(Add a question tag)

ANSWER IS:
That was your idea, wasn't it?

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

SENTENCE 10:
The test was easy.
(Add a question tag)

ANSWER IS:
The test was easy, wasn't it?

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