1. They will have given up the research by now.

The research will be had given up the research by now.

2. I didn't have an umbrella with me, so I got wet.

If i had had an umbrella with me, I would have gotten wet.

3. She went to university because she wanted to study English. (Use 'to infinitive')

She went to university to study English.

4. They didn't come back home until 9 p.m.

It was not untill 9pm that They came back home

5. They have built a new market here.

A new mảket has been built here

6. I don't have enough money. I cannot buy a new house.

If  I had enough money. I could buy a new house.

7. . Linda didn't become a famous singer until 2019.

It was not until 2019 that Linda became a famous singer

8. I didn't go to bed until midnight.

It was not untill midnight that i went to bed

9. They haven't stamped the letter.

The letter haven’t been stamped

10. We didn't hurry, so we missed the train.

If We had hurried , we would have missed the train.

11. Nigel hasn't got satellite TV, so he can't watch the game.

If Nigel had gotten satellite TV, he could have watched the game.

12. Jane will clean the floor tomorrow.

The floor will be cleaned tomorrow by jane

13. He has sent his son to another school.

His son has been sent to another school

14. We went to the market. We wanted to hey some fruit. ( Use 'to infinitive')

We went to the market to hey some fruit