1. I don’t have many friends. ->I wish I had many friends
2. They work slowly. ->I wish they worked fast
. 3. I am not good at English.-> I wish I were good at English
4. He studies badly. ->I wish he studied well
5. He doesn’t like playing sports. ->I wish he liked playing sports
6. Mary started playing the piano when she was 6.-> Mary has played the piano since she was 6
7. She last went shopping last month. ->She hasn’t gone shopping since last month
8. The last time I met her was two weeks ago. ->I haven’t met her for two weeks
9. We have never seen this movie before. ->It's the first time I have seen this movie
10. It's a week since they cleaned their room. ->They haven't cleaned their room for a week
11. Study hard or you will fail the exam.-> If you don't study hard, you will fail the exam
12. Hurry up or you will miss the bus. ->If you don't hurry up, you will miss the bus
13. If you don't finish your homework, you can't go to bed. ->Unless you finish your homework, you can't go to bed
14. I don't have enough money, so I can’t buy this book. ->If I had enough money, I could buy this book
15. Mary can't go to the party because she has to do her homework. ->If Mary didn't have to do her homework, she could go to the party
16. People make cheese from milk. ->Milk is used to make cheese
17. Tom broke the flower vase last night.-> The flower vase was broken last night
18. My mother is cooking dinner now. ->Dinner is being cooked by my mother now
19. We should keep the environment clean. ->The environment should be kept clean
20. No one has used this computer for a long time. This computer hasn't been used for a long time