Before and After 以前。以后。

https://www.youtube.com/watch?v=W2PvmEO_LCc&ab_channel=ChineseZerotoHero

https://www.youtube.com/watch?v=Xdi5L0BFLkY&ab_channel=TwinCitiesChineseTutor


后来

过会儿   、 待会儿  dài huì er, 稍后 shāo hòu

以后