请说一下whatever whenever however whichever的用法及意思.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/28 18:10:13

请说一下whatever whenever however whichever的用法及意思.
还有为什么有些句子中一定用whenever而不用when呢?

whatever：无论什么,不管什么
whenever：不管什么时候
however：然而（表转折）
whichever：不管哪个
whenever是不管什么时候,when是当什么时候
比如：Come whenever you like.你什么时候想来就来.
这里就不用When,whenever用在这个句中有客气的意思
It was raining when we arrived.
我们到的时候正在下雨.

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