sit/ down. Ask a polite negative question.
Why don't you sit down?
it/ is time/ to say goodbye. Make a negative question.
Isn't it time to say goodbye?
You/ can/ help/ set the table. Ask as a polite negative question.
Why don't you set the table?
you/ having fun. Make a negative question.
Aren't you having fun?
help/ me/ clean up. Ask a polite negative question.
Why don't you help me clean up?
You/speak/English. Make a negative question.
Don't you speak English?
could/ you/ do it. Make a negative question.
Can't you do it?/ Couldn't you do it?
you/ know/ how to drive. Make a negative question.
Don't you know how to drive?
Well,/ you/ are/ the cutest. Make a negative question.
Well, aren't you the cutest?
They/ clean/ the bathroom/ every week. Make a negative question.
Don't they clean the bathroom every week?
Why/ you/ like her. Make a negative question.
Why don't you like her?