Put the verbs into Past Simple. Use the modal verbs and their equivalents: 1. He must work hard to finish his experiment. 2. I can devote myself to scienti fic work. 3. You may repeat this experiment. 4. He must illustrate this law by several experiments. 5. She can study automation in the college. 6. They may carry out these experiments at the laboratory.
Ex.1.1 is learning; 2 am writing; 3 have also typed; 4 has been planting; 5 has written; 6 have just heard; 7 are the play starting; 8 have been working; 9 have been practicing; 10 go
Ex.2. A 1 arrived; 2 were queuing; 3 were waiting; 4 had bought; 5 walked; 6 entered; 7 felt; 8 had reached; 9 went down;
B 1 hired; 2 drove; 3 arrived; 4 was blowing; 5 was; 6 got out; 7 took; 8 decided; 9 had seen; 10 had left; 11 had already grown; 12 was walking; 13 began; 14 didn`t mind; 15 had had
Ex3.1 am finishing; 2 are you wearing; 3 will wash; 4 will posting; 5 will be; 6 am making