Гроза, 9. Students book. Unit 3. Lesson 7. Exercise 3

a) If I hadn’t fallen down, they wouldn’t have helped me.
b)We wouldn’t have become friends if they hadn’t come to help me.

a)If I hadn’t thrown paper balls, I wouldn’t have fallen down.
b)The class wouldn’t have laughed if I hadn’t fallen down.

a) If I hadn’t woken up late, I would have looked in the mirror.
b)I would have washed if I had looked in the mirror.

a) If the teacher had thrown the sweet better, he wouldn’t have hit me.
b)I wouldn’t have felt awful if they/teacher hadn’t laughed at me.

a) The powder wouldn’t have slipped out of my hand if I had been more careful.
b)If my best friend had gone to get the things, he/I wouldn’t have dropped the powder.