1. They are going to clean banks of the lakes at weekends (Dùng thì tương lai gần và cấu trúc at weekends: vào cuối tuần)

2. How many hours a week do you spend watching TV? (cấu trúc spend + V-ing)

3. It was a national holiday yesterday, so my friends and I went on picnic (cấu trúc go on picnic: đi picnic, chia động từ ở thì QKĐ)

4. In the end, I decided not to buy that dictionary because it was too expensive (cấu trúc in the end: cuối cùng, decide to V: qđịnh làm gì)

5. He has worked in this factory since he left the university.  (cấu trúc S + have/has + done + since + S +V(QKĐ))

6. Nga was very tired last night; however, she had to finish the homework (Chia động từ ở thì QKĐ)

7. He has tried to give up smoking four times, but he can not break this habit. (four times dấu hiệu thif HTHT, try toV: cố gắng lam gì, give up + V-ing: từ bỏ việc làm gì)