`1,` Mai hasn't come back to her village for 11 years.

`2,` Mr. Bean has played the violin since he was a student.

`3,` How long has he owned that house?

`4,` He hasn't written to her for years.

`5,` Nam has lived in Ca Mau since he was a child.

`6,` Minh hasn't gone for a holiday for two years.

`7,` Nick has been a member of a golf club for a year.

`8,` I have studied English for three weeks.

`9,` She hasn't seen her elder sister since 1999.

`------`

${\text{Giải thích: }}$

`-` The last time `+` S `+` V-ed/V2 `+` was `+` khoảng thời gian `+` ago.

`=` S `+` have/has `+` not `+`  V-ed/V3 `+` for `+` khoảng thời gian/since + mốc tgian.

`--` 

`-` S `+` have/has `+`  V3/V-ed `+` for + quãng tgian/since + mốc tgian

`=` S `+` started/began `+` V-ing/to V0..

`=` S `+` have/has `+`  been `+` V-ing `+` for + quãng tgian/since + mốc tgian..