1. Now there are many cars on the roads than before

2. My brother used to be a professor at Ha Noi University some years ago, but now he is an engineer

3. Linh used to walk to school some years ago but now she cycles there

4. My father used to swim in the pool near his house when he was a boy

5. There used to be many green trees in front of my house but now it is a big car park

- Used to được sử dụng để nói về một thói quen, hành động, sự kiện hoặc trạng thái đã từng xảy ra trong quá khứ và không còn xảy ra trong hiện tại nữa

(+) S + used to + V-bare

(-) S + didn't use to + V-bare

(?) Did + S + use to + V-bare ?

- There used to be : Đã từng có

1. There did not use to be many cars on the roads before.

Now there are…more cars on the road than before

2. My brother was a professor at Ha Noi University some years ago, but now he has a job as an engineer at a big company.

My brother……to be a professor at Ha Noi University some years ago, 

3. Linh walked to school some years ago but now she cycles there.

Linh used to…walk to school some years ago.

4. My father swam in the pool near his house when he was a boy.

My father…used to swin in the pool near his house when he was boy.…

5. There were many green trees in front of my house but now it is a big car park.

There used to… be many green trees in front of my house but now it is a big car park