Ex 47 Complete the following sentences according to the model

Model: She asked him this question while he (tell us about his stay in London).

She asked him this question while he was telling us about his stay in London.

1. Her face didn't show anything while he (say this). 2. We continued to discuss the problem while they (have a smoke in the corridor). 3. While I (wait for you), I looked through all these magazines. 4. It began to rain while he (sleep in the garden). 5. He stopped her while she (enter the office). 6. We waited in the sitting-room while she (speak to a friend over the telephone). 7. Everybody watched his face while he (play the piano). 8. While I (eat my sandwiches) at the station bar, two strangers came in. 9. While she (wait) for the bus, she read the newspaper.

Ex 48 Make up sentences according to the model.

Model: The teacher, write something on the blackboard; the students, think of the problem.

While the teacher was writing something on the blackboard, the students were thinking of the problem.

1. The children, play in the garden; their mother, read a book. 2. She, make breakfast; he, look through the morning papers. 3. I, wait for you; you, watch the football match on TV. 4. They, talk of old days; the band, play dance music. 5. She, make tea in the kitchen; he, unpack his things. 6. These thoughts, pass through his head; he, ask different unimportant questions.

The Use of the Present Perfect Tense in the Meaning