Let's go out for dinner.

`->` Why don't we go out for dinner?

We last my old friend was 2 years ago.

`->` We have not seen my old friend for 2 years.

Although he was ill, he went to school.

`->` Despite his illness, he went to school.

We did not go out for dinner because it rained heavily.

`->` Because of the heavy rain, we didn't go out for dinner.

My teacher said to her students "You must do homework"

`->` My teacher said to her student that they must do their homework.

`text{- Why don't we go out for dinner?}`

`text{- We have not... my old friend for 2 years (thiếu đề!)}`

`text{- Despite being ill, he went to school}`

`text{- Because of the heavy rain, we did not go out for dinner}`

`text{- My teacher said to her students that they must do homework}`