高中英语 Unit 4 Global Warming doubt 怀疑知多少学案 新人教版选修6

Unit 4 Global Warming学案4doubt 怀疑知多少doubt 一词由于词义特殊,其用法较为复杂。其具体用法如下: 一、作及物动词常用于下列句型中,作"怀疑;不能肯定;不大相信"解,一般不用进行时态。 1.后接名词、代词或 V-ing 形式。如: I've always doubted his honesty. 我一直对他的诚实表示怀疑。 We may have it ready, but I very much doubt it. 我们也许能够把它弄好,但我认为可能性不大。 Nor do we doubt being able to finish it in time. 我们也相信能够及时完成它。 2. 用于否定句或疑问句,后接 that 引导的宾语从句。如: I don't doubt that he is telling the truth. 我毫不怀疑他在讲真话。 Do you doubt that he will win the match? 你怀疑他会赢这场比赛吗? 3.用于肯定句,一般接 whether 或 if 引导的宾语从句.如: I doubt whether we will make a profit out of it. 我认为我们不可能从此事中获利。 We doubt if she will be persuaded. 我们不知道她会不会被说服。 4.用于肯定句,后接 that 从句,表示疑虑更大,表示"不相信",相当于 don't believe / think.如: I doubt that she will get the job. 我不相信她会得到那个工作。 二、作不可数名词,作"疑惑;怀疑(间或作可数名词)"或"不确定状态"解。 1. 接 about, as to 等。如: There is not much doubt about his guilt. 他的有罪是没有多少怀疑的。 I have my doubts as to the report being true. 我怀疑报道是否真实。 I have no doubt about who did it. 这件事是谁干的,我心中有数。 2.否定句中 doubt 多接 that 同位语从句。如: There is no doubt that they will ask you for help. 毫无疑问,他们会请你帮忙的。 I have no doubt that you will succeed. 我毫不怀疑你会成功的。 3. 肯定句中 doubt 多接 whether (一般不用 if 代替) 同位语从句。如: There's some doubt whether he'll keep his promise. 他会不会信守诺言还难说。 She had her doubts whether the new book would sell well. 她怀疑新书是否会畅销。 4. no doubt 表示"多半;很可能;必定"。如: No doubt he was just trying to help, but in fact he just got in the way. 他多半...