概述
副词子句在主要子句中用来修饰动词、形容词、副词等，是可有可无的修饰语，将整个副词子句去掉后也不会影响主要子句的正确性。
将直述句改为副词子句
如果是将直述句改为名词子句，加上连接词that就可以了；而将直述句改为副词子句时，却需要加上一些有意义的连接词，如because、although、if、as、when、where，用来表述各式各样的逻辑关系，如[原因、让步、条件、状态、时间、地方]
He said it so sincerely that his wife forgave him right away.
来自Information Question
No matter where the criminal is hiding,the police is going to get him.
Wherever the criminal is hiding,the police is going to get him.
来自Yes/No Question
Whether he’s still alive(or not),I’m not going to marry anyone else.
No matter he’s stll alive(or not),I’m not going to marry anyone else.
