(1)、疑問詞+ever whatever, whoever, whichever, whenever,
　　wherever, however用來引導讓步狀語從句，相當于no matter和what, who, which, when, where, how連用。
　　[例句]
　　Whatever (=No matter what) may happen, we shall not lose hope.
　　無論發生什么事，我們都不能失去希望。
　　Whatever reasons you (may) have, you should carry out a promise. 無論你有什么理由，你都應該遵守諾言。
　　Whoever (=No matter who) comes, he will be warmly welcome. 無論誰來，都會受到熱烈歡迎。
　　Whenever (=No matter when) it happened, it was certainly not yesterday.
　　此事無論發生在何時，但絕不是昨天。
　　Whenever you (may) call, you will find her sitting by the window. 無論什么時候你去找她，你都會看到她坐在窗邊。
　　Wherever (=No matter where) he went, he made friends with people.
　　Whichever (=No matter which) of them you many choose, the quality will be the same.
　　他們當中不論你選哪一個，品質都一樣。
　　However (=No matter how) hard I have tried, I can’t find the answer.
　　(2)、whatever, whoever, whichever, whomever等引導名詞性從句，這時不能用no matter+疑問詞替換。
　　[例句]
　　Take whichever you want. 你要哪個就拿哪個。
　　We will do whatever we can to help him out. 我們要盡力幫助他擺脫困境。
　　I’ll show you whatever you want to see. 你想看什么我就給你看什么。
　　Whoever did this job must be rewarded. 無論誰做這件事都要得到報酬。
　　Whoever walks around in such a heavy rain will catch a cold. 任何人在這種大雨中行走都會患感冒。
　　You may invite whomever(口語中常用whoever代替)you like to the party. 你可以邀請你喜歡的人來參加晚會。
　　Take whatever magazines you want to read. 你可以取閱任何你想讀的雜志。