—When using tag questions, watch for 4 points:
* What tense is the verb?
* What kind of verb is it? (to be/other verbs)
* Is the sentence affirmative or negative?
* Does the pronoun need to be changed?
*present tense ->
*to be verb ->
*affirmative ->
—*present tense
*to be verb
*negative
Look at these changes:
—Jack's happy, isn't he? he is -> isn't he?
—Susan's tired, isn't she? she is -> isn't she?
— It's warm today,isn't it? it is -> isn't it?
— They're busy,aren't they? they are -> aren't they?
—You and I are fun people, aren't we? we are -> aren't we?
— You're quiet, aren't you? you are -> aren't you?
—I'm intelligent, aren't I?
am I not? I am -> aren't I?
I am -> am I not?