Unless
1Công thức
Unless + affirmative verb, main clause (= If ... not)2Giải thích
Unless nghĩa là 'trừ khi' (= if ... not). Sau unless dùng động từ ở dạng khẳng định vì nghĩa phủ định đã có trong từ này.
Unless means except if or if not. It introduces the only circumstance in which the main clause will not be true.
Dấu hiệu: unless
3Khi nào dùng
- Stating the only exception to a condition
- Warnings and threats
4Quy tắc cần nhớ
- Use an affirmative verb after unless; the negative meaning is already in the word
- Unless is not normally used in questions or in third conditional sentences; use if ... not instead
5Ví dụ
We'll play tennis tomorrow unless it rains.
You can't enter the lab unless you wear a lab coat.
6Lỗi thường gặp
- Unless you don't hurry, you'll miss the bus. (should be Unless you hurry)
- Unless you aren't ready by nine, we will leave without you. (should be Unless you are ready)