1 . was walking, saw
2 . was helping, came
3 . Was cooking , played
4 . Were playing , slept
5 . was working, called
6 . watched , were playing
7 . was washing , began
8 . Blew , landing
9 . Was playing, began
10. Was watching , went
11. Was playing, listened
12. Was tidying, whased
13. helped, was watering
14. Met , was walking
15. Played , was reading
1can2can't3can't4can't5can't6can7can8could9couldn't10mustn't11must
12can(must)13must(can.can't.mustn't)
14mustn't15mustn't16must(should)
17may18can't19mustn't(shouldn't)
20may
1. Carefully putting fresh flowers on the table, my sister went for the vase. 2. Having collected a lot of mushrooms in the forest, we decided to cook them for lunch. 3. Writing a new picture, the artist decided to relax a bit. 4. Painted my brother, these doors look much better. 5. Jokingly, our colleague told us that he again praised the head. 6. Since the boss again praised him, our colleague decided that he can give us advice. 7. Stroked my mother, my pants looked like new. 8. Stroking shirts, my sister in a low voice sang.