II.
1. tidy
2. collecting
3. rehearsing
4. plays
5. lying - watching
6. go
III.
1. Let's play soccer.
Should we play soccer?
2. Let's go swimming.
Should we go swimming?
3. Let's invite him to the party.
Should we invite him to the party?
4. Let's go to the library.
Should we go to the library?
5. Let's travel by bus.
Should we travel by bus?
6. Let's visit our old teachers.
Should we visit our old teachers?
IV.
1. He always goes to the church on Sunday.
2. They are usually free on the weekend.