Unless I ………….. a quiet room I won’t be able to do any work. * having had have have not If you took more exercise, you …… ……… better. * felt would feel feel feeled They would be offended if I …… …… to their party. * didn’t go not go don’t go not to go

`1`. have

`⇒` Cấu trúc: If + S + V(HTĐ), S + will + Vo

`⇒` Cụm Unless = If not

`⇒` Dich: Nếu tôi không có 1 phòng yên tĩnh, tôi sẽ không thể làm bất kì việc gì.

`2`. would feel

`⇒` Cấu trúc: If + S + V(QKĐ), S + would + Vo

`3`. didn't go

`⇒` Cấu trúc: If + S + didn't + Vo, S + would + Vo...