在复合句中，主语从句、宾语从句、表语从句和同位语从句在用法上相当于名词，故统称为名词性从句。•1.When we will start is not clear.•2.Mrs Black won’t believe that her son has become a thief.•3. My idea is that we should do it right now.•4.I had no idea that you were her friend.主语从句宾语从句表语从句同位语从句 名词性从句由连接词、连接代词和连接副词引导，为陈述句语序。 1. I think that he’ll be all right in a few days.2. I wonder if you can do me a favor.3. The questions is whether we should ask them for help.连接词在从句中不做成分。连接代词在从句中作主语、表语、定语或宾语。连接副词在从句中作状语。 宾语从句就是在复合句中作宾语的名词性从句 , 通常放在主句谓语动词或介词之后。宾语从句：1 I think (that) he’ll be all right in a few days.2 Do you know who they are waiting for?3 Pay attention to what the teacher said.4 We came to where he lived. 1. We thought it strange that Xiao Wang did not come yesterday.2. He has made it clear that he will not give in.注意 1 ： it 常可以放在动词 think, find, consider, believe, feel, make 等后作为形式宾语 , 真正的宾语 -that 从句则放在句尾 .We heard it that she would get married next month.我们听说她下个月就要结婚了。 1. 我怀疑他是否会说英语。2. 我毫不怀疑，他会说英语。I don’t doubt that he can speak. I doubt whether/ if he can speak English.注意 2 ： doubt 的肯定形式后接 whether/if 从句，否定和疑问形式后接 that 从句。 1. 我肯定他能做好。I’m sure that he can do it well.2. 我不能肯定消息是否属实。I’m not sure whether/if the news is true.3. 你确定他是一位教师吗？Are you sure that he is a teacher?注意 3 ： be sure 的肯定和疑问形式后面接 that从句，否定形式后面接 whether/if 从句。 我认为这件衣服不适合你穿。I don’t think this dress fits you well. 注意 4 ：否定的转移若主语谓语动词 think,consider, suppose,believe, expect...
