`text{1.}` She hasn't sent me letters since last year.

`text{→}` Phủ định của hiện tại hoàn thành :

S + have/has not + VPII + for/since thời gian

or  The last time she sent me letters was last year.

`text{→}` The last time ( Lần cuối cùng) + S + V quá khứ + was + thời gian

`text{2.}` It's ages since she last phoned her parents.

`text{→}` It is + thời gian + since + S + last + V quá khứ

`text{3.}` We haven't gone to this restaurant for a long time.

`text{→}` Phủ định của hiện tại hoàn thành :

S + have/has not + VPII + for/since thời gian

`text{4.}`  How long have you moved to this house ?

`text{→}` How long + have/has + S + VPII ?

`text{5.}` She has moved to this city for 4 weeks.

`text{→}` S + have/has + VPII + for/since thời gian

`text{6.}` The last time I saw my brother was many years ago.

`text{→}` The last time ( Lần cuối cùng) + S + V quá khứ + was + thời gian

`text{7.}` The last time wetook to the zoo was 5 months ago.

`text{→}` The last time ( Lần cuối cùng) + S + V quá khứ + was + thời gian

`text{8.}`  I have been to Nha Trang three times. 

`text{→}` Lần thứ 3 làm 1 việc nào đó : S + have/has + VPII + three times.

`text{9.}` Isn't this the first time you have come here ?

`→` Isn't + this the first time + S + have/has + VPII ?