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HSK 2.0 Level 4+ HSK 3.0 Level 4+ 6 min read

Double Negatives for Emphasis: 不得不, 不能不, 没有……不

Use two negatives to make a strong positive, like 不能不去 “have to go” and 没有人不知道 “everyone knows”.

Pattern

不得不 / 不能不 / 不会不 + verb; 没有(一个)人 + 不 + verb

Two negatives make a positive that sounds stronger than the plain one: 不能不去 is firmer than 要去.

我们班没有一个人不喜欢王老师。

When to use Double Negatives for Emphasis: 不得不, 不能不, 没有……不

Two negatives in one sentence cancel out and give a strong positive: 不能不去 “can’t not go” = must go. The common frames are 不得不 + verb “have no choice but to”, 不能不 + verb “must, it would be wrong not to”, 不会不 + verb “will certainly”, and 没有(一个)人不 + verb “everyone”. Each sounds firmer than the plain positive (要去, 会来, 都喜欢).

雨太大了，比赛不得不停下来。

The rain was so heavy that the match had to stop.

明天是奶奶的生日，我不能不去。

Tomorrow is Grandma’s birthday; I have to go.

他已经答应我了，不会不来的。

He’s already promised me; he’ll definitely come.

没有人不知道这家饭馆。

Everybody knows this restaurant.

Common traps

  • For “I must go”, say 我不能不去, not 我不能去 (that means “I can’t go”).
  • Don’t stack two 不 directly: 他不会不来, not 他不不来. A modal verb such as 会 or 能 goes between them.
  • 不得不 already means “have to”; don’t add 要: 我不得不走了, not 我不得不要走了.

Targeted drill

Practice this exact pattern before moving on.

我 不迟到了

I will never be late again
Fill in the missing piece, then press Enter

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