Answer:
1. She <u>doesn't go</u> (not/go) to school on Mondays.
2. They <u>were</u> (be) late 2 weeks ago.
3. <u>Do you go</u> (you/go) to London every Summer holidays?
4. I <u>am playing</u> (play) football now.
5. They <u>don't watch</u> (not/watch) tv on Mondays.
6. <u>Does he cut</u> (he/cut) the grass every Friday?
7. She <u>is not finishing</u> (not/finish) the test at present.
8.<u> Was she </u>(she/be) angry yesterday?
9. <u>Are we cooking</u> (we/cook) dinner now?
10. You <u>don't do</u> (not/do) homework every day.
11. She <u>wasn't</u> (not/be) at school yesterday.
12. She<u> is </u>(be) Polish.
13. A cat <u>drinks</u> (drink) milk every day.
14. He <u>likes</u> (like) drinking orange juice.
15. We <u>weren't </u>(not/be) at school 2 days ago.
Explanation:
Note that we usually decide which verb form to use according to time expressions given in the sentence.
For instance, time expressions such as <em>every summer holiday, on Monday, every Friday, every day</em> indicate that we are talking about a repeated action/habit and that the tense we need to use in these sentences is present simple tense. On the other hand, if we have time expressions such as <em>now, at present, at the moment</em>, we need to use present continuous tense. Expressions such as<em> yesterday, two days ago, 2 weeks ago </em>require past simple tense, etc.
