1 We seldom eat before 7 am

2 I haven't met him since I met him 2 months ago

3 Listen! I think someone is knocking

4 I got up

5 circles 

6 Did - watch

7 is working

8 have - seen 

9 flow

10 is crying

11 is smoking

12 goes 

13 are - have been

14 will move 

15 have seen

16 goes

17 has lost

18 Will - take

19 takes 

20 hasn't finished 

21 haven't seen

22 was - broken

23 sets

24 have lived 

25 comes

26 stops

27  has read - have - read

28 are putting

29 did - do

30 has finished

31 have just seen

32 have already shown

33 have just  sold

34 did - buy

35 have known - were - haven't met - left 

36 have been 

37 Did - spend 

38 visited 

39 is working 

40 has seen 

41 has used

42 bought

43 have lived

44 is playing

45 has taught

46 goes - went

47 is snowing

48 hasn't spoken
49 is working

50 is