doubt的用法精讲精练讲义--高考英语一轮复习.docx

Doubt的用法Doubt既可用作动词，也可用作名词。一、doubt用作动词1. doubt+宾语从句（1）在否定句和疑问句中，doubt后面接that引导的宾语从句。    I dont doubt that he can finish the task on time.    Do you doubt that she will succeed? （2）在肯定句中，doubt后面一般接whether或if引导的宾语从句。   I doubt whether they can swim across the river.     He doubts if she will keep her word. 二、doubt用作名词 1. doubt常与about/of等介词连用。      There is no doubt about it.       I have no doubt of his ability.  2. doubt+同位语从句 （1）doubt用在否定句中，后面接that引导的同位语从句。 I have no doubt that he will succeed.  There is no doubt that they will agree with you on this matter.There is little doubt that Mr Ball was keen to get his hands on the company.（2）doubt用在肯定句中，后面接whether引导的同位语从句。There is some doubt whether their football team will win the match. There is some doubt whether he is the best man for the job.          3. 由doubt组成的一些短语  （1）in doubt怀疑；拿不定主意       When in doubt about the meaning of a word, consult the dictionary.(2）no/without/beyond doubt无疑地；必定；当然 It is no doubt difficult.  No doubt he didnt mean to hurt you.  Without doubt this is the best.  Beyond doubt he will give you some advice on your study.(3）make no doubt of 对毫不怀疑 She made no doubt of what he had said. （4）throw/cast doubt on使人对产生怀疑Galileos experiments threw doubt on Aristotle”s theory of falling objects.What he had done cast doubt on his honesty.4.doubt的派生词（1）doubtful adj.怀疑的，不确定的；未必的，不大可能的；不可靠的He was doubtful about accepting the work.他不大可能接受这份工作。（2）doubtless adv.无疑地，肯定地;adj.无疑的，肯定的He would doubtless disapprove of what Kelly was doing. 他不会赞同凯利做的事。(3) doubting    adj.不相信的，有疑心的  She's a doubting Thomas. 她生性多疑。填空练习1. I always had doubts _ he would be the best man for the job, but now I dont doubt _he can do it.2. There is no doubt _stress can lead to physical illness.3. There is some doubt _ she will come on time.4. It seemed to me that she was in doubt _ Timmy lived or died.5. I never doubt _Jerry is suitable for the job.Key:1.whether;that 2.that 3.whether 4.whether 5.that学科网（北京）股份有限公司