名词性从句连接词的选用(一)that 和 what 的选用：that 和 what 都可引导所有的名词从句。但是，what 除起连接作用外，还在名词性从句中充当成分，可做从句的主语、宾语、或表语。而 that 在名词性从句中不充当任何成分，只起连接作用。that / what1.______ he wants is a book.2. ______ he wants to go there is obvious.3.The result is ______ we won the game.4.This is _____ we want to know.5.Is _____ he told us true ?6.We should pay attention to ______ the teacher is saying.7. I have no doubt _____ he will come.8. I have no idea _____ he did that afternoon.(二） if 和 whether 的选用不能使用 if 的情况：a. 主语从句 b. 表语从句 c. 同位语从句d. 介词后的宾语从句 e. whether to do 做动词宾语不能用 if to do.f .whether or not 连在一起引导宾语从句时不用 if.1. I asked her __________ she had a bike.2.______ we will hold a party in the open air tomorrow depends on the weather.3. We’re worried about ________ he is safe.4. I don’t know ___________ he is well or not.5. I don’t know ________ or not he is well.6. The question is _________ he should do it.7.The doctor can hardly answer the question ______ the old man will recover soon.8. I don’t know _______ to go.（三）其它连接代词和副词的连用 主要根据名词性从句中的具体意义,正确的选择 who、which、when、where、why、how 等连接词，这些连接词既具有疑问含义，又起连接作用，同时在从句中充当各种成分。我们何时举行运动会还没有决定。________ we shall hold our sports meeting is not decided.我不知道昨天谁打破了玻璃。I don’t know _________ broke the glass yesterday.我不知道他长的什么样子。I have no idea _________ he looks like.这就是我忘记眼镜的地方。This is _________ I left my glasses.（四）引导词 that 的省略that 可省略的情况：单个宾语从句中的 that 可省略that 不可省略的情况：a. 主语从句用心 爱心 专心1b.表语从句c.同位语从句d.用 it 做形式宾语的宾语从句e....
