关于doubt 与 suspect的词义辨析

doubt 与 suspect 作动词用，都有“怀疑”的意思，但实际上它们的用法还是有区别的。

下面我们就来比较一下：
一 . 如果后面接名词、代词或名词性词组时，两者基本上可通用。

例如：
1.I doubt/suspect the truth of her statement. 我对她那番话的真实性表示怀疑。

2.He says he can cure me， but I still doubt/suspect him. 他说他能治好我的病，但我仍对他不放心。

3.We all suspect the truth of the report.
我们对报告的真实性感到怀疑。

二 . 如果后面接 that 从句，意思就截然不同。

doubt 意为“无把握；不相信（ question the truth of； don't believe/think ）”，怀疑其无。

suspect 意为“有存在或属实的想法；相信（ have an idea of the existence； believe； guess ）”，怀疑其有，猜疑(是), 怀疑(是), 觉得(是)，怀疑…有罪。

例如：
1.I doubt that he has stolen my watch. 我不相信他偷了我的手表。

2. I suspect that he has stolen my watch. 我怀疑 / 猜想他偷了我的手表。

3. The doctor suspected that he was ill with flu. 医生怀疑 / 认为他得了流感。

4. I suspect he is a thief.我怀疑他是贼。

对…有所察觉，疑有：
5. It was too late for him when he suspected he had fallen into the trap.当他觉出上了当时，已为时晚矣。

6. I suspect they were right.我觉得他们是正确的。

如果用doubt表示“怀疑其有”时，这时的 doubt 更多用于否定句或疑问句中。

如：
7.I don't doubt that he is right. 我确信他是对的。

8.I didn't doubt that he would come. 我当时相信他会来的。

9.Why did she doubt that they were cheats？她为什么怀疑他们是骗子？
三 . doubt 用于肯定句中时，多接 whether/if 引导的从句，意义与 that 从句不同，这时意为“不敢肯定（ feel uncertain about ）”。

而 suspect 不可接这种从句。

例如：
1.I doubt whether/if he'll come. 我不敢肯定他来不来。

2.It's raining hard. I doubt whether it will be fine tomorrow. 雨下得很大，我不敢说明天会晴。

doubt 后接宾语从句时，如主句为肯定句时用 if 或 whether 连接宾语从句；如主句为否定句或疑问句时用 that 连接宾语从句，表示：“不信任，不相信，怀疑，疑惑”
3. I doubt whether (或 if) he will want to participate.我怀疑他是否愿意参加。

4. I don't doubt that she's telling the truth.我并不怀疑她讲的是真话。

5. Do you doubt that I love you?我爱你，对此你有怀疑吗?
[后接宾语从句时，如主句为肯定句时用if 或 whether 连接，如主句为否定句和疑问句时则用that 连接]不能肯定，拿不准，对…没准儿，对…吃不准：
6. I doubt whether (或 if) he'll change his mind.我拿不准他是否会改变主意。

7. I wouldn't doubt that he'd want to help.我肯定他愿意帮忙。

四 . 其他搭配。

doubt 可作不及物动词，用于 doubt of sth；
She never doubted of his success. 她从不怀疑他的成功。

固定搭配：
She never doubted of his success. 她从不怀疑他的成功。

no doubt adv. 无疑地；很可能地
in doubt 可怀疑的；不能肯定的
there is no doubt that…毫无疑问
without doubt 无疑地；确实地
have doubts about 怀疑
without a doubt 无疑地
beyond doubt 无容置疑，确实地
cast doubt on 引起对…的怀疑；对…产生怀疑
reasonable doubt 合理的怀疑
beyond all doubt adv. 毫无疑问地
hang in doubt 悬而未决；还不能确定
suspect 用于 suspect sth to be，
suspect sb of（doing） sth .例如：
The police suspect him of having taken the money.
警察怀疑钱是他偷的。

They suspect him to be a thief.
他们怀疑他是个贼。

I suspect him to know everything about that.
我猜想那件事他全都知道了。

I suspected him to be the spy. 我认为他就是那个间谍。

What made you suspect her of having taken the money.
五、doubtful 和sceptical
doubtful 怀疑的，不能确定的，不大可能的 sceptical 怀疑的，持怀疑态度的The teacher was doubtful about having parents working as classroom assistants.
这位教师对由家长担任课堂助教一事拿不定主意。

It is doubtful whether they ever reached the summit before they died.
他们死前不可能到达山顶。

Many experts remain sceptical about\ of his claims.
很多专家对他的主张仍持怀疑态度。

I’m extremely sceptical about what I read in the press.
我对报纸上读到的东西很不相信。