doubt/daʊt/

n. a feeling of being uncertain about sth

v. not feel certain about sth

n. [C; U] 怀疑，疑惑：[doubt about sth] I have doubts about her ability to do the job. 我对她做这项工作的能力感到怀疑。

◇[there's no doubt (that) ...] There is no doubt (that) we will win. 我们会赢，这一点毫无疑问。

v. [T] 怀疑：I doubt her story. 我怀疑她说的事。

◇[doubt (that) ...] I doubt (that) he will take part in the activity. 我怀疑他会参加这次活动。

◇[doubt whether（或if）...] I doubt if the boss will meet him. 我怀疑老板是否要见他。

常犯错误

✗ It is no doubt that ...

✓ There's no doubt that ... 毫无疑问…

常犯错误

✗ I don't doubt whether smoking is bad for your health.

✓ I don't doubt that smoking is bad for your health. 我不怀疑吸烟有害健康。

[✌否定和疑问句的doubt后接that引导的从句。肯定句的doubt后则多接用whether/if引导的从句。]