1 He isn't old enough to go to school.

2 She has long, black hair.

3 He prefers playing soccer to playing tennis.

4 The water is too dirty for him to go swimming.

5 I used to smoke 10 years ago.

6 Is this the cheapest computer ?

8 I used to be afraid of ghost.

9 You don't need to finish the work today.

10 I haven't read a book since September 20.

11 It has snowed since 5 o'clock.

12 This book is as boring as that one.

1. He is too young to go to school

He is not old enought to go to school

2. Het hair is long and black

She has a long and black hair

3.He'd rather play soccer than tennis

He prefers playing soccer to playing tennis

4.The water is so dirty that he can't go siwmming

The water is such a dirty that he can't go swimming

5.I gave up somking ten years ago

I used to smokingten years age

6. Do you have a cheaper coputer than this?

Is this a cheaper computer than this, isn't it?

8. When I was a child,I was afraid of ghost

I used to afraid of ghost when I was child

9. It isn't important for you to finish the work today

You don't have to finish the work today

10. I last read a book on September 20

I haven't read a book since September 20

11. It started to snow at 5 o'clock

It has snowed since 5 o'clock

12. This book is very boring,and so is that one

This book is as boring as that one