1. I eat chocolate less than her

2. Vinh is always forgetting his homework (is always + V-ing = Than phien)

3. It's very important to keep the environment clean

4. Lan wasn't helped to do the homework (Xem lai dang dac biet cua cau bi dong)

5. I haven't spoken to her for three years

6. Tam used to type fast (Co the co nhieu cau khac nua)

7. When did you got the car?

8. We have lived here for 35 years

=>

1. I don't eat as much chocolate as she does. 

2. Vinh is always forgetting his homework. 

3. It's very important to keep the environment clean.

4. Lan did the homework herself.

5. I haven't spoken to her for three years.

6. Tam used to type fast.

7. When did you use the car?

8. We have lived here for 15 years.