Các bài tập chuyển đổi câu về thì thường hay xuất hiện trong các đề thi quốc gia. Với mục đích giúp các em học sinh có thêm tài liệu và bài tập để luyện tập, thay mặt tổ Ngoại ngữ, tôi mạn phép được đưa ra một số công thức phổ biến như sau:
1.
|
S + began/ started + V-ing/ To V …….. in+time/ time+ago
have/ has + been + V-ing…….
|
Ex: I started learning English five years ago
I have been studying English for five years
2.
|
S + have/ has + (not) + Ved/3…… for + time It’s + time + since + S + (last) + Ved/2
|
Ex: I haven’t seen him for two months
It’s two months since I last saw him
3.
|
S + have/ has + not + Ved/3………for/ since + time
in + time
in + time
|
Ex: I haven’t seen him for two moths
The last time I saw him was two months ago
I last saw him two months ago
4.
|
S + have/ has + not + Ved/3………before It/this/that is the first time + S + have/ has + Ved/3 |
Ex: I haven’t seen that man here before
It is the first time I have seen that man here
5.
|
S + have/ has + never + Ved/3 + such (a/ an) + Adj + N It/this/that is the + Adj (superlative) + S + have/ has + ever + Ved/3
|
Ex: I’ve never met such an intelligent boy
This is the most intelligent boy I’ve ever met
6.
|
S + had + hardly + Ved/3 + when + S + Ved/2 = Hardly + had + S + Ved/3 + when + S + Ved/2 S + had + no sooner + Ved/3 + than + S + Ved/2 = No sooner + had + S + Ved/3 + than + S + Ved/2 |
Ex: He had hardly seen me when he ran away
He had no sooner seen me than he ran away
LUYỆN TẬP
I. Rewrite these sentences as directed:
1. Mary began playing the piano 4 years ago
Mary has _______________________________________________
2. The last time I went to see them was over a year ago
It __________________________________________
3. It is two weeks since it last rained
It has __________________________________________
4. Jane started keeping a diary five years ago
Jane has _________________________________________
5. I last went swimming in 2001
I have ______________________________________________
6. We haven’t seen Tom since he moved to London
We last ____________________________________________
7. My father hasn’t driven a car before
It’s ____________________________________________________
8. She has never been to the ballet dancing before
This is ___________________________________________________
9. Before he watched TV, he had done all his exercises
After _____________________________________________________
10. This is the first time I have ever met such a famous person
I’ve _____________________________________________________
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