1 - She is not/isn't cooking dinner.
2 - They are not/aren't studying for the test.
3 - We are not/aren't living in a small city.
4 - Marcos is not/isn't doing exercise every day.
1 - Is she cooking dinner?
2 - Are they studying for the test?
3 - Are we living in a small city?
4 - Is Marcos doing exercises every day?