Задание 1
going, meeting, opening, playing, doing, making, writing, reading, watching, eating, drinking, cleaning, having, sleeping
Задание 2
1. playing
2. watching
3. reading
4. sleeping
5. eating
6. drinking
7. doing
Задание 3
1. i'm not playing
2. isn't cleaning
3. isn't having
4. aren't writing
5. aren't opening
6. aren't doing
7. isn't eating
Задание 4
1.is playing. Isn't
2. are writing. am
3. is cleaning. Isn't
4. am reading. am
5.are having. Aren't
6. are sleeping. are
7. is eating. is