`35.` She hasn't kissed her son for `6` years.

`36.` They haven't cleaned the windows for two months. 

`37.` You haven't tidied this room for two weeks.

`-` Cấu trúc: S `+` last `+` Ved/C2 `+` khoảng thời gian `+` ago

`->` Ai đó làm gì lần cuối cùng cách đây bao lâu ...

`=` S `+` have/has `+` not `+` Ved/C3 `+` for `+` khoảng thời gian

`->`Ai đó/ sự vật gì/ hiện tượng gì đã không … trong khoảng …

`----------------`

`38.` Learning a foreign language is important.

`39.` Participating in the event is interesting.

`40.` Doing exercise in the morning is very refreshing.

`-` Cấu trúc: It is `+` adj (for sb) `+` to V `:` Thật như thế nào khi làm gì ...

`=` To V/V-ing `+` is `+` adj `:` Làm gì đó như thế nào ...

`35` She hasn't kissed her son for `6` years.

`36` They haven't cleaned the windows for two months.

`37` You haven't tidied this room for two weeks.

`38` Learning a foreign language is important.

`39` Participating in the event is interesting.

`40` Doing exercise in the morning is refreshing.

`______________________________________________`

`***`

   S + have/has + not + Vp2 + for + time

   V-ing + be + adj