宾语从句一、宾语从句的概念:宾语从句：在复合句中充当宾语的句子。宾语从句在句中作及物动词的宾语，或介词的宾语，或形容词的宾语。We know Li Na.We know that Li Na plays tennis very well.He tells me a story.He tells me that Li Na plays tennis very well.二、宾语从句三要素 : 时态、语序、引导词三、宾语从句的引导词(种类)1. 由that引导的宾语从句由that引导的宾语从句由述句转化而来，用来述一件事或表达一种感情。that只作引导词，没有实在的意义，可以省略。He said (that) he wanted to stay at home. I am sure (that) he will succeed.2. 由if或whether引导的宾语从句由一般疑问句转化而来，放在 ask，see，know，wonder , find out 等动词/组后面，表示选择，要用述语序。if或whether的意思是“是否”，可换用，不可省略。I want to know if (whether) he lives there. He asked me whether (if) I could help him.只用whether，不用if的几种情况：⑴当从句中有or not时。We didn't know whether or not she was ready.I want to know whether you can come or not. ⑵当从句用作介词宾语时。I’m thinking of whether we should go fishing.I worry about whether I hurt her feelings. (3)当引导词和动词不定时(to do sth.)连用时。We didn’t decide whether to go to Beijing.I don’t know whether to see my doctor today. 3. 由连接代词who, whom, whose, what, which和连接副词when, where, why, how(how many…)引导的宾语从句。是由特殊疑问句转化而来，要用述语序，引导词是原句中的特殊疑问词(意义也不变)，不可省略。 放在：see, say, tell, ask, answer, know, decide, find out，sugges |
