Упражнение 1.
1) She is writing a letter.
2) They are watching TV.
3) He is waiting at the bus stop.
4) He is skateboarding.
5) We are doing an exam.
6) I am swimming.
Упражнение 2.
1) She isn't writing a letter.
2) They are not watching TV.
3) He isn't waiting at the bus stop.
4) He isn't skateboarding.
5) We are not doing an exam.
6) I am not swimming.
Упражнение 3.
2) Is Gina writing a letter?
No, she isn't.
3) Is Max driving?
Yes, he is.
4) Are our parents making dinner?
No, they aren't
5) Are you and Pat doing a test?
Yes, we are.
6) Am I meeting friends?
No, you aren't. (No, I am not.)