used to+ V: dùng để nói đến một thói quen, sự kiện hay hành động từng xảy ra trong quá khứ không còn tiếp diễn và hiện tại

Khẳng định: S+ used to+ V

Phủ định: S+ didn't use to + V

1. My husband didn't use to do housework.

2. Children didn't use to play with high-tech devices at early age.

3. The students didn't use to go to school by public transportation.

4. My city used to be a tourist destination.

5. Traffic jam didn't use to happen when I was small.

6. My mother used to work at a restaurant 3 years ago.

7.He used to be the President of Student Union .

8. There used to be many tree-lined streets in my hometown