doubt
noun
verb
daʊt noun
1 a feeling of being not sure whether something is true or right 不确定，怀疑 C,U
2
no doubt
used when you are saying that you think something is probably true 无疑，很可能
No doubt you’ll have your own ideas.
当然，你会有自己的想法。
She was a top student, no doubt about it (=it is certainly true) .
她是一个最优秀的学生，这是毫无疑问的。
3
if/when (you’re) in doubt
used when advising someone what to do if they are uncertain about something 如（你）无把握，如（你）有怀疑〔用于建议〕
If in doubt, consult your doctor.
如有疑虑就咨询你的医生。
4
be in doubt
if something is in doubt, it may not happen, continue, exist, or be true 不肯定，没把握
The future of the peace talks is in doubt.
和谈前途未卜。
5
beyond doubt
if something is beyond doubt, it is completely certain 确实，确凿，无疑
The prosecution must prove beyond reasonable doubt that the accused is guilty of the crime.
控方必须提供被告有罪的确凿证据。
put the game/result/match beyond doubt (do something which makes it certain that a particular player or team will win a match) 给竞赛/结果/比赛确定胜负
Ferdinand’s second goal put the game beyond doubt.
费迪南德的第二个入球决定了比赛的胜负。
6
without doubt
used to emphasize an opinion 确实，的确〔用于强调某个观点〕
Jo is without doubt one of the finest swimmers in the school.
乔毫无疑问是学校最优秀的游泳能手之一。
7
open to doubt
something that is open to doubt has not been proved to be definitely true or real 有待证明的
The authenticity of the relics is open to doubt.
这些圣徒遗物的真假有待考证。
verb
8 to think that something may not be true or that it is unlikely 怀疑，不确信
Kim never doubted his story.
金对于他讲的事情从不怀疑。
doubt (that)
I doubt we’ll ever see him again.
我想我们再也见不到他了。
doubt if/whether
You can complain, but I doubt if it’ll make any difference.
你可以投诉，但是我看未必有用。
‘Do you think there’ll be any tickets left?’‘ I doubt it (=I don’t think so) .’
“你认为还会有余票吗？”“我看是没有了。”
9 to not trust or have confidence in someone 不信任〔某人〕，对〔某人〕没有信心
I never doubted myself. I always knew I could play tennis at this level.
我从来都相信自己，我一直都知道我网球能打出这个水平。
She loved him, and had never doubted him.
她爱他，对他从来没有产生过怀疑。
I have no reason to doubt his word (=think that he is lying) .
我没有理由不相信他的话。