`text{1.}` Unless you want to go to see the concert, you can leave your ticket for me.

`text{2.}` Unless students go to school on time, they will be punished.

`text{3.}` Unless the young girl stops smoking, she may suffer from lung cancer.

`text{4.}` Unless you pay back the money you owe me, ,I will sue you.

`text{5.}` Unless you are older than 18, I will not sell you these beer packs.

⇒ `text{CT :}` If ⇔ Unless

`text{+}` Thay If= Unless, giữ nguyên 1 vế và trái vế còn lại.

`text{+}` Đảm bảo vế sau Unless không có not.

1. Unless you want to go to see the concert ,you can leave your ticket for me.

2. Unless students go to school on time,they will be punished.

3. Unless the young girl stops smoking,she may suffer from lung cancer.

4. Unless you pay back the money you owe me ,I will sue you.

5. Unless you are older than 18 I will not sell you these beer packs.

Công thức:

Câu điều kiện loại 1:

If S + don't/doesn't + V sth, S will(not) V sth : Nếu không...

= Unless + S + V sth, S + will (not) V sth : Trừ khi....

Note: Unless + mệnh đề dạng khẳng định (+)