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 quá khứ đơn

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: định làm gì

5. He has worked in this factory since he left the university

→ cấu trúc S + have/has + done + since + S +V (quá khứ đơn)

6. Nga was very tired last night; however, she had to finish the homework 

→ Chia động từ ở thì quá khứ đơn

7. He has tried to give up smoking four times, but he can not break this habit

→ four times dấu hiệu thì hiện tại hoàn thành, try to V: cố gắng làm gì, give up + V-ing: từ bỏ việc làm gì

8.  I am glad to see my old friends again after a long time

→ cấu trúc S + be + adj + to V

9. He may be sick because he did'nt go to the class this morning

→ sau may + V

10. My  father didn't let me go to school alone when I was small 

→ Kể về kỉ niệm ⇒ chia quá khứ đơn, let somebody + V

11. We did the test well although it was difficult 

→ sau V là 1 trạng từ

12. You should take an umbrella because it is raining heavily now 

→ sau V là 1 trạng từ

13. It took me half an hour to repair the bike yesterday 

→ cấu trúc take + somebody + to V, chia thì quá khứ đơn

14. She spends an hour a day studying English

→ cấu trúc spend + V-ing

🍀 @ɷįᵰƫ 🍀

1. They are going to clean banks of the lakes at weekends
 vì có dấu hiệu nhận bt là :vào cuối tuần→ Dùng thì tương lai gần 
2. How many hours a week do you spend watching TV?
3. It was a national holiday yesterday, so my friends and I went on picnic
dấu hiệu nhận b là yesterday nên chia thù quá khứ đơn
4. In the end, I decided not to buy that dictionary because it was too expensive
5. He has worked in this factory since he left the university

6. Nga was very tired last night; however, she had to finish the homework 

có dấu hiệu nhânj bt là last night nêchia thì QKĐ 
7. He has tried to give up smoking four times, but he can not break this habit

 có dấu hiệu nhận bt là four timesnên chia thì  hiện tại hoàn thành

8.  I am glad to see my old friends again after a long time
9. He may be sick because he did'nt go to the class this morning
cấu trúc: May+V
10. My  father didn't let me go to school alone when I was small 
11. We did the test well although it was difficult 
12. You should take an umbrella because it is raining heavily now 
13. It took me half an hour to repair the bike yesterday 
14. She spends an hour a day studying English

sau spend + V-ing