Als de zin is negatief, questions tag is positief.
It isn't raining,
is it? The sun isn't shining, is it?
I can't sing, can I?
You will not come, will you?
She wasn't crying, was she?
We don't speak English all the time, do we?
She doesn't speak English all the time, does she?
We didn't invite her to dinner, did we?
They haven't finished the road works yet, have they?