正确写法是which ever和what ever。what ever是无论什么的意思，是泛指所有东西的；而which ever是无论哪一个的意思，是有选择性的，是指多个事物中无论哪一个，是在多个事物中选择。
which ever造句
1、Choose whichever you prefer to use.
2、Agents could subscribe to whichever message streams interested them.
3、You may take whichever(=any) seat you like.
4、Whichever shows trend of depreciation, countries can abandon the currency; whichever demonstrates trend of appreciation, countries can buy in the currency.
5、We will let you sign up for whichever recitation makes sense for you.
what ever造句
1、I'll try to do whatever is right.
2、People play indoor sports whatever the weather.
3、We must fulfill the plan, whatever happens.
4、The willful child would not listen to whatever you say.
5、Use your camera strap (or whatever) as a brace.