Ex.4
paint - painter - painting
perform - performer - performance
dance - dancer - dance
entertain - entertainer - entertainment
juggle - juggler - juggling
mime - mime - mime
do magic - magician - magic trick
Ex.9
1. got, were waiting
2. arrived, were having
3. were walking, saw
4. got, was climbing
5. was listening, fell
6. was surfing, found
