-ever构成的合成词有哪些用法

however作可是，不过讲，作插入语用，有时作连词，如however, we will look into the matter later，不过我们以后还是要调查这件事

在疑问句中，however, whatever, wherever, whenever, whichever, whoever作究竟如何，究竟什么，究竟何处，究竟何时，究竟哪个，究竟谁讲

这些单词有强调语气的作用，如wherever there is plenty of sun and rain, the field are green，哪里阳光雨水充足，哪里的田野就是绿油油的

引出名词性从句，如whatever is worth doing at all is worth doing well凡是值得做的，就值得好好去做，you may take whichever book will interest you哪本书你感兴趣，你就可以拿哪本书

whatever在让步从句中作表语用时，可以省略be，如friction always opposes the motion, whatever its direction不论方向如何，摩擦总是阻碍运动的

whatever修饰名词时作无论怎样讲，但修饰any或当前面有否定词时，则whatever就放在所修饰的词的后面，如there is no doubt whatever about that,关于那件事绝无疑义