S + V (hiện tại hoàn thành) + for +time ð It is + time +SINCE + S + V(quá khứ)

(chia phủ định)​

​Ex: ​a) I havent eaten this kind of food for 2 years. ​

ð It is 2 years SINCE I ate this kind of food.

​​b) I havent seen my father for one month. ​​

ð It is one month SINCE I last saw my father

2. S + HAVE / HAS + NOT + V-ed / V3 ...SINCE (FOR) ..

ð S + LAST +V(past simple) .. WHEN

THE LAST TIME + S + V(past simple) WAS .

Ex: a) I havent heard him since August.​​ð The last time I heard him was in August.

b) I havent seen him since I was a student.​ð I last saw him when I was a student.

Exercise : Write the sentences in another way, beginning as shown.

1. She last worked as a secretary 4 years ago.​

ð She has

2. My sister last studied English a year ago.​​

ð She has

3. Its three years since she last met him​

ð She has

4. My grandfather hasnt lived here for 3 years.​

ð My grandfather last

5. ð Its 3 years since

6. I havent played football since 1970.​​​

ð The last time

7. We havent seen Tom since he moved to Bristol.​

ð We last

8. I havent eaten this kind of food for 2 years.​​

ð It is .

9. I havent enjoyed myself so much for years.​​

ð It is .

10. I last saw him a year ago.

ð I havent

11. The last time I drank coffee was three days ago

ð I last

ðI have..

12. My father hasnt smoked cigarettes for a month.

It is

13. The last time I took an English course was 2 years ago .

I have

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