conditionals :
1.If I hadn't been for my teacher's help, I wouldn't have finished the paper.
But for..........
2.Since he hadn't studied much, he didn't pass the entrance examination.
If...........
3.Children had better take their parents' advice.
Children.........
4. If you don't go on a strict diet, you won't loose weight.
Unless you.......
5.If they hadn't stolen the car Hadn't they they wouldn't be in trouble now.
Hadn't they.......
6.If he hadn't been such a liar, she would marry him.
Hadn't he.......​