`-` CĐK Loại `1` : Diễn tả hành động có thật ở Hiện tại

`+` If - clause : Thì HTĐ : S + Vs / es

`+` Main - clause : Thì TLĐ : S + will + V

`-` CĐK Loại `2` : Diễn tả hành động không có thật ở Hiện tại

`+` If - clause : Thì QKĐ : S + Ved / V2

`+` Main - clause : Thì TLTQK : S + would + V

`-` CĐK Loại `3` : Diễn tả hành động không có thật trong Quá khứ

`+` If - clause : Thì QKHT : S + had + VpII

`+` Main - clause : Thì TLHT trong QK : S + would have + VpII

`-` Unless `=` If not : Trừ phi

`1`.Unless she hurries , she'll be late

`2`.Unless we didn't have more rain , our crops would be better

`3`.Unless you like this one , I will bring you another

`4`.Unless you are careful , you will cut yourself with that knife

`5`.Unless I don't do now have a quiet room , I'll be able to do any work

`6`.Unless the flood hadn't risen higher , the crops would have been ruined

`7`.Unless you had sneezed , he wouldn't have known that we were there

`8`.Unless she didn't do her hair differently , she would look quite nice

`9`.Unless John hadn't played for our football team , we wouldn't have lost the game

`10`.Unless I didn't win the first prize in a lottery , I'd give up my job

`\text{# TF}`

$\text{Câu điều kiện loại 1:}$

$\text{Cấu trúc Unless được dùng ở câu điều kiện loại 1 nhằm thể hiện 1 sự việc có thể xảy ra ở tương lai.}$

$\text{Cấu trúc: Unless + S + V (simple present), S + will/can/shall + V}$

$\text{Câu điều kiện loại 2:}$

$\text{Cấu trúc Unless được sử dụng trong câu điều kiện loại 2 nhằm thể hiện một tình huống không thể xảy ra trong hiện tại.}$

$\text{Cấu trúc: Unless + S +Ved / V2 (simple past), S+ would + V}$

$\text{Câu điều kiện loại 3:}$

$\text{Trong câu điều kiện loại 3, sử dụng cấu trúc Unless nhằm để diễn đạt tình huống đã không xảy ra trong quá khứ.}$

$\text{Cấu trúc: Unless + S + had + Ved/V3 , S + would + have + Ved/V3}$

$\text{1. Unless she hurries, she'll be late.}$

$\text{2. Unless we had more rain, our crops would not be better.}$

$\text{3. Unless you like this one, I will bring you another.}$

$\text{4. Unless you are careful, you will cut yourself with that knife.}$

$\text{5. Unless I have a quiet room, I won't be able to do any work.}$

$\text{6. Unless the flood had risen higher, the flood would not have been ruined.}$

$\text{7. Unless you had sneezed, he would not have known that we were there.}$

$\text{8. Unless she did her hair differently, she would not look nice.}$

$\text{9. Unless John had played for our football team, we would have lost the game.}$

$\text{10. Unless I won the first prize in a lottery, I'd not give up my job.}$