`1` Unless you like this one, I'll bring you another

`2` Unless she hurries, she'll be late

`3` Unless you are careful, you'll cut yourself

`4` Unless you had sneezed, he wouldn't have know that we were there

Giải thích 

Unless ≈ If not

`->` Cấu trúc Unless ở câu đk loại `1` : Unless +simple present , S + will/can/shall + V-inf

`->` Diễn tả một sự việc có thể xảy ra trong tương lai. Ta có thể sử dụng cả Unless và If not thay thế cho nhau

`->` Cấu trúc Unless ở câu đk loại `2` : Unless + mệnh đề thì QKĐ , would/could + V-inf

`->` Dùng để diễn tả một tình huống không thể xảy ra trong hiện tại. Có thể sử dụng cả Unless và If not thay thế cho nhau

1. If you do not like this one, I’ll bring you another

<Dịch: Nếu bạn không thích cái kia, tôi sẽ mang cho bạn cái khác>

Unless = If not

-> Unless you like this one, I'll bring you another

Cấu trúc: Unless + S + V, S + will + V

2. If she does not hurry, she’ll be late

-> Unless she hurries, she'll be late

3. If you are not careful, you’ll cut yourself

-> Unless you are careful, you'll cut yourself

4. if you had not sneezed, he wouldn’t have known that we were there.

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