一. 宾语从句的种类宾语从句是一种名词性从句，在句中作及物动词的宾语，或介词的宾语，或形容词的宾语。根据引导宾语从句的不同连词，宾语从句可分为三类。1. 由 that 引导的宾语从句。That 只有语法作用，没有实在的意义，在口语和非正式文体中可以省略。He said (that) he wanted to stay at home. I am sure (that) he will succeed.1）在 think, believe, suppose, expect 等动词引起的宾语从句中，有时谓语尽管是否定意义，却不用否定形式，而将 think 等动词变为否定形式。I told him that he was wrong. I don’t think you are right. (我认为你做的不对)2. 由连接代词 who, whom, whose, what, which 和连接副词 when, where, why, how 引导的宾语从句。这些连接代词和连接副词在宾语从句中充当某个成分。例如：Do you know who (whom) they are waiting foe? He asked whose handwriting was the best.Can you tell me where the No.3 bus stop is? I don’t know why the train is late.2、由连词 if、 whether 引导的表示“是否…”的宾语从句。Whether, if 在从句中不做句子的成分，一般情况下，whether 和if 可以替换。 I don’t know if/whether he will come tomorrow.The teacher asked if/whether we had finished the experiment.1）在介词后面的宾语从句中不用 if 引导 例：Everything depends on whether we have enough money。2）宾语从句中有 or not 时不用 if 引导. 例：I don’t know whether the movie star will come or not.3）和不定式连用作宾语时不用 if 引导. 例：Whether to go there or not hasn’t been decided.二. 宾语从句的语序，宾语从句的语序应为陈述句的语序。I hear (that) physics isn’t easy. I think (that) you will like this school soon. Can you tell me how I can get to zoo? Please tell me when we’ll have the meeting.三. 宾语从句的时态 1. 如果主句的时态是一般现在时，宾语从句该用什麽时态就用什麽时态。I don’t think (that) you are right. Please tell us where he is.2. 如果主句的时态是一般过去时，宾语从句只能用相应的过去时态（一般过去时， 过去进行时， ...
