Question

Choose the correct verb forms to complete the sentences. 1 Why have you switched off / beеn switching off the сomputer? Ithink I've found / been finding a good artice aboue space discovery. 3 They've studied / been studying the galaxy forsic months now. 4 Нave you finished / Have you been finishing that bnok about the solar system yet? 5 Scientists haven't discovered / haven't been discouenine the nature of these satellites yet. 6 Look at Jenny! She's painted / been painting and she's covered in paint! 7 Why have you sat /been sitting in front of your computer all day? 8 Ive read /bееn reading Tim's book about the Voyager space probe: I'Llend it to you when I've finished it​

Answer 1

1. switched off

2. found

3. been studying

4. haven't you finished

5. haven't discovered

6. been painting

7. been sitting

8. been reading

Answer 2

Here are the correct verb forms for each sentence:

1. Why have you switched off the computer? (This is a simple past tense action, so "switched off" is correct.)
2. I think I've found a good article about space discovery. (This is a simple past tense action, so "found" is correct.)
3. They've been studying the galaxy for six months now. (This action started in the past and continues into the present, so "been studying" is correct.)
4. Have you finished that book about the solar system yet? (This is a simple past tense action, so "finished" is correct.)
5. Scientists haven't discovered the nature of these satellites yet. (This is a simple present perfect tense, so "haven't discovered" is correct.)
6. Look at Jenny! She's been painting, and she's covered in paint! (This action started in the past and continues into the present, so "been painting" is correct.)
7. Why have you been sitting in front of your computer all day? (This action started in the past and continues into the present, so "been sitting" is correct.)
8. I've been reading Tim's book about the Voyager space probe; I'll lend it to you when I've finished it. (This action started in the past and continues into the present, so "been reading" is correct.)