11. Unless we protect the environment, we will destroy ourselves.
=> If ....................................................
12. She will get low marks unless she is more hard-working.
=> If ...................................................................
13. Unless he listens to his parents, he will fail.
=> If .......................................................
14. If we don't plant more trees, the air won't be fresher.
=> Unless ....................................................
15. We won't reduce pollution if we don't use fewer cars.
=> Unless ....................................................
16. If she doesn't cycle to school every day, she won't keep fit.
=> Unless ...........................................................
17. Use recycled products, and you will save money.
=> If ...................................................
18. Throw rubbish into the right bin, or you won't keep the environment clean.
=> If ............................................
19. Everybody will leave if he doesn't come to the party on time.
=> Unless ...........................................................
20. Study hard, and you will get good grades.
=> If ...........................................................
21. Take an umbrella, or you will get wet.
=> If ........................................................
22. Get up early in the morning, or you won't go to school on time.
=> If ................................................................
Unless que pritect the environment, we will destroy ourselves .
If we don't protect the environment, we will destroy ourselves.
2,unless she is more hard working, she will get low marks
If she isn't more hard-working, she will get low marks.
3,unless he listen to his parents, he will fail.
If he doesn't listen to his parents, he will fail.
4,they began watching the movie one hour ago
They have watched the movie for one hour.
5,he last cried ten years ago
They have never cried for ten years.