original reason (理由/原因) It takes/took sb. some time to do sth. that, whether, as, as if, as though, because引导的表语从句 that,if, whether引导的宾语从句

physical 一般现在时 一般将来时 主语从句的连接词 连接代词和连接副词引导的表语从句

period truth worry 一般将来时 that, whether, as, as if, as though, because引导的表语从句

fact most of… 一般现在时 that, whether, as, as if, as though, because引导的表语从句

一般现在时 现在完成时 连接代词和连接副词引导的表语从句

try by the way 一般现在时 连接代词和连接副词引导的表语从句

when (当…时候) 连接代词和连接副词引导的表语从句 条件状语从句

perfect possible saying come to practice/practise (doing) sth. 动名词作宾语 一般现在时 that, whether, as, as if, as though, because引导的表语从句 在suggestion/advice等名词后的表语从句+(should) do as引导非限制性定语从句

bride ceremony wedding 连接代词和连接副词引导的表语从句 as引导非限制性定语从句