1.This is the first time I have eaten this kind of food.

Giải thích:this is the first time+S+have/has+VpII

2.Plans have been drawn for an extension to the house by the architect.

Cấu trúc bị động ở thì hiện tại hoàn thành: S +has/have + been + V3,ed

3. You don't have to finish by Saturday.

Giải thích:isn't necessary=don't have to

4. She has worked as a secretary for 5 years.

Giải thích:câu bị động thì HTHT:S+has/have + been + V3,ed+for+time

5.  The streets haven't been cleaned this week .

Giải thích:câu bị động thì HTHT:S+has/have + been + V3,ed

6.It took us 5 hours to get to London.

Giải thích:It took+O+time +to+Vo

7. It takes me 20 minutes to get to work .

Giải thích:It+take+O+time+to+Vo

8. The sea was too rough for the children to go swimming.

Giải thích:S+be+too+Adj(for O)+to V-inf: quá để làm gì

9.How  beautiful this  flower is!

Cấu trúc: How + adj/adverb+S+V/be!

10.Our dog bit the postman .

11. I suggest asking her yourself.

Giải thích:cấu trúc suggest có 2 công thức

• s+suggest+Ving...

•S1+suggest+S2+should+Vo

Mình đang sd công thức đầu tiên

12.   After he had left school, he joined the army.

Cấu trúc: After+S+V thì QKHT, S+V thì QKĐ

Chúc bạn học tốt

Cho mình xin 5 sao vì sự cố gắng này nha

1.This is the first time I have eaten this kind of food.

2.Plans have been drawn for an extension to the house by the architect.

Cấu trúc bị động ở thì hiện tại hoàn thành: S +has/have + been + động từ phân từ II 

3. You don't have to finish by Saturday.

4. She has been working as a secretary for 5 years.

5.  The streets haven't been cleaned this week .

6.It took us 5 hours to get to London.

7. It takes me 20 minutes to get to work .

8. The sea was too rough for the children to go swimming.

9.How beautiful this flower is!

10.Our dog bit the postman .

11. I suggest that you should ask her yourself .

12.   After having left school, he joined the army.