名词性从句名词性从句的几个难点that 通常不可省略的三种情况(1)引导主语从句，that 置于句首时。That he failed in the exam made his parents disappointed.他考试不及格让父母很失望。(2)当一个句子有两个或多个并列的宾语从句时，引导第二和以后几个从句的 that 不可省略。I wished (that) we could go sighting in Hangzhou this summer and that we could buy some books on our way back in Shanghai.我希望今年夏天我们能去杭州旅游，并在返程时在上海买些书回来。(3)由 it 作形式宾语时，that 引导的宾语从句中，that 也不可省略。He has made it clear that he wouldn’t agree to the plan.他已清楚表明不同意这项计划。what 和 that 在名词性从句中的区别 (1)what 在名词性从句中可充当主语、宾语和表语，意义上相当于 the thing(s) that，引导主语从句时，其谓语动词的单复数由表语的单复数而定；what 引导的从句可作介词的宾语从句。What he wants are those books.他需要的是那些书。What he wants is some water.他需要的是一些水。A modern city has been set up in what was a wasteland ten years ago.一个现代化的城市已经在 10 年前还是一块废地的地方建造起来了。(2)that 不充当任何句子成分，只起连接作用，无任何意义；引导主语从句时，常用 it 作形式主语，谓语动词用单数；引导宾语从句时，常被省略；that 从句一般不充当介词宾语，偶尔可作 except，in 的宾语。That she will refuse the offer seems unlikely.(＝It seems unlikely that she will refuse the offer.)她不可能拒绝那个建议。I have found (that) all the tickets have been sold out.我发现所有的票已售完。He is a good student except that he is a little bit careless.除了有点粗心之外，他是一个好学生。whether 与 if 的用法比较用心 爱心 专心1(1)二者均可作“是否”讲，都可以引导名词性从句，引导宾语从句可以互换。I don’t know whether/if he’ll attend the meeting.我不知道他是否会出席会议。(2)在下列情况下，常用 whether，不用 if。①whether 引导从句可以放于句首。Whether he comes or not makes no difference.他来不来都一样。②whether 可引导表语从句和同位语从句...
