1. Unless you are careful, you will cut yourself with that knife
2. Unless you like this one, I'll bring you another.

3. I'll not be able to do any work unless I have a quiet room.
4. Unless you study hard, you'll fail in the exam.
5. Unless she waters these trees, they will die.
6. Unless I have time, I'll not help you.
7. Unless I win a big prize in a lottery, I won't build a school for the poor.
8. Unless you like this one, I'll bring you another.
9. She couldn't have stolen the jewels unless she had had inside help.
10. Unless management and union become more flexible, there will be a lot more strikes.

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unless = if .. not : nếu không thì

Câu điều kiện loại 1

If + S + V(s,es), S + Will/Can/shall…… + V

 Điều kiện có thể xảy ra ở hiện tại ở tương lai