doubt
单词辨析：
指不相信或不确定某事的真实性，不用进行时，可后接从句。
I doubt whether he will come to my birthday party.
我不确定他是否会参加我的生日聚会。
You can appeal, but I doubt if it'll make any difference.
你可以上诉，但我看未必有用。
She never doubted her husband's stories.
她从来没怀疑过丈夫的各种假话。
指有疑问，觉得有某种可能，尤指坏事属实或发生的可能，不用进行时，在肯定句和否定句中如接从句均用 that 引导。
I suspected that this was what he wanted.
我猜这是他想要的。
They suspected him of betraying state secrets.
他们怀疑他泄露了国家机密。
相关例句：
This raises doubts about the point of advertising
这对做广告的意义提出了疑问。
His ability is beyond any doubt.
他的能力毋庸置疑。
No one doubted his ability
没有人怀疑他的能力。
They were troubled and full of doubt
他们很苦恼且充满疑虑。
She's a very sweet woman, as you no doubt know by now.
她是一个非常温柔的女人，你现在肯定知道了。
No one directly involved with the case doubted him
与此案直接相关的人中没有人怀疑他。