宾语从句
结构
主语 + 谓语/+adj. + 引导词 + 从句
引导词
- that (可省略) //陈述句
- if/whether //一般疑问句
- 特殊疑问词 //特殊疑问句
whether与if的区别:
- whether or not
- whether to do
- 介词后,用whether 例: Joe is worried about whether she will come.
- 置于句首时,用whether 例: Whether you are wrong or not is not important.
- 宾语从句是否定时,用if 例: She doesn't mind if you can't pass the exam. 她并不关心这次考试你是否不及格
常见谓语动词
- that:
- find,know,think,believe,hope,notice,mean
- if/whether/特殊疑问词:
- ask,see,wonder,find out
doubt
- 肯定句中,可以接 whether/if 从句 例:I doubt whether he will come
- 否定句中,必须使用 that 从句 例:I don't doubt that he will succeed