doubt的用法

●doubt--suspect

●doubt:

1，doubt当动词时,在<肯定句>中后面可接if或whether。在否定句及疑问句中可跟that从句。有时在<肯定句>中也能跟that从句,但其含义是"恐怕...不会"。

I doubt if (或whether) he will win.我怀疑他能否赢。

I don't doubt that he will win.我毫不怀疑他会成功。

Do you doubt that he will win?你怀疑他会成功吗?

I doubt that he will win.恐怕他赢不了。

作名词用时，后常跟同位语从句, ★肯定句一般用连接词whether,“I doubt whether we‟ll see the comet if the clouds don’t clear soon.”★如肯定句用that, 往往表示非常怀疑如：I doubt that Fred has really lost 25 pounds. ★疑问句和否定句用连接词that, Do you doubt that he will pass the exam? ★There is no doubt about sth./that...意为：“某事是肯定无疑的”eg: There is no doubt that we will win the game.没问题我们会赢得这场比赛●doubtful: adj. 可疑的, 不确的, 疑心的

●suspect: “猜想”、“有点感觉到……”

★suspect something/nothing/anything怀疑…, He never suspected anything. ★suspect sb. of (to be)sth/doing sth: ）疑心某人干某事; 认为…犯…罪; 以为suspect sb. of giving false information 怀疑某人提供假情报doubt 与suspect 作动词用的区别的。

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：

二. 如果后面接that 从句，doubt 意为“无把握；不相信，怀疑其无。suspect怀疑其有。例如：I doubt that he has stolen my watch. 我不相信他偷了我的手表。I suspect that he has stolen my watch. 我怀疑/ 猜想他偷了我的手表。三．suspect和doubt在使用结构上也不一样：suspect that…或suspect sb.of sth.;doubt whether…(or…)，在否定句和疑问句中用doubt that…;作非及物动词时用doubt of(about)。

Ex of doubt: 1). I doubt very much ____ the tickets for tomorrow have ____. A. that, been sold away. B. that, been sold out. C. if, sold out D. weather, been sold out. (D).

2). ____ is no doubt ____ man can't live without air or water. A. There, that B. It, that a C. That, the

D. As, / (A).

3). Do you doubt ____ he'll leave all his money to his former wife? A. that B. whether C. when D. which (A)

4). What I really doubt is ____ Mr. Brown will return to his hometown this weekend. A. when B. whether C. why D. how 答案：B 解析：这是一个表语从句，根据doubt可排除选项C和D，再根据时间状语this weekend排除选项A。

5. Jackson __________ secrets to the enemy and was arrested by the police. A. suspected to give B. was suspected of giving rumor C. was suspected to give D. was suspected giving (B。suspect用做：suspect that…或suspect sb.of sth/doing sth.；doubt用做：“doubt whether…（肯定句），doubt that…（否定句和疑问句）

6. It is reported that a _______ parcel was found at the station. A. doubting B. doubtful C. suspect D. suspected (C)

7. Their dog always returns home on time, they looked it till mid-night, and began to ______ it is lost. A. agree B. wonder C. doubt D. suspect (D。suspect表示怀疑时，侧重于“猜想”、感觉到…“；doubt侧重于“不相信”) 8. Some researchers believe that there is no doubt ______ a cure for AIDS will be found. A. which B. that C. what D. whether (05, 广东，B)