Rewrite sentences:
1. Unless we protect the evironment, we will destroy ourselves.
If_________________________________________________
2.Unless she is more hard - working, she will get low marks.
If_______________________________________________
3.Unless he listens to his parents, he will fail.
If____________________________________
4.They began watching the movie one hour ago.
They have _______________________________
5.He last cried ten years ago.
He has ________________________
1. Unless we protect the evironment, we will destroy ourselves.
If_______we don't protect the enviroment , 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 listens 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.
He has _____not cried for ten years___________________
