宾语从句1、 定义:宾语从句是在复合句中起宾语作用的从句。根据引导词的不同,宾语从句又可分为:以从属连词that引导的宾语从句、已从属连词whether或if引导的宾语从句、以连接代词或连接副词引导的宾语从句。1、 that引导的宾语从句 由that引导的宾语从句大多由陈述句充当。从属连词that无实际意义,不在从句中作任何成分,此时从句的成分齐全,句意明确,在口语和非正式文体中that可以省略。Im extremely sorry that I have lost your book.Were all pleased that we have once again overcome the difficulty.Do you think (that) it will rain?We know (that) we should study hard.2、 whether或if 引导的宾语从句 Whether/if引导的从句可视为直接引语为一般疑问句转变为间接引语而成,其语序由原来的倒装语序变成陈述语序,从句前加上连词whether或if。