“疑问词 + ever ”可分为两类，“疑问代词 + ever ”： whatever / whichever / whoever （宾格 whomever )和“疑问副词 + ever ”： wherever / whenever / however。
不论是“疑问代词 + ever ”还是“疑问副词 + ever ”，其意义都是“不管 / 无论 + 该疑问词的本义”.
（1）引导让步状语从句.此时 whatever / whoever / whichever 分别等于“ no matter + what / who / which”。例如：
Whatever happened / No matter what happened,he wouldn’t say a word。.
Whoever says so / No matter who says so， it is wrong.
Whicheverwhatever什么意思 / No matter which dictionary you （may） take，you will have to pay at least 20 dollars。
注意：这类从句中应用一般现在时表将来，从句中也常用情态动词 may / might .
(2）引导名词性从句.例如：
Whoever smokes here will be punished。 （主语从句）
Beggars will eat whatever they are given. (宾语从句）
Whichever he likes will be given to him. （主语从句）
You may invite whoever / whomever you like。 （常用 whoever 代替 whomever）
此时它们都不能换成“ no matter + 疑问词”的形式，但 whoever 等于 anyone who， whatever 等于 anything that.
2。 “疑问副词 +ever ”： wherever / whenever / however 一般只能引导一种类型的从句，即让步状语从句,此时它们分别等于“ no matter + where / when / how ".例如：
Wherever / No matter where he goes (may go）。 I'll follow him.
Whenever / I visited him ， he was always busy workings .
However late he is / No matter how late he is，his mother will wait for him to have 注意：当 however 用作连接副词时也可引导名词性从句，而 whenever/ wherever 则不能引导名词性从句。例如：
I’ll give you however much money you need。 (宾语从句，此时 however 不能改成 no matter how ）.
3。 另外， whatever / whichever / whoever 与 whenever / wherever / however 分别可相当于 what / which / who 与 when / where / how 的强调式，引起的特殊疑问句往往是简单句,与原疑问词的意思、用法完全相同，只是表达的语气更为强烈，翻译时可加上“到底;究竟"等。例如:
What(ever） are you doing ? 你(到底）在干什么?
Which（ever) do you want to buy ？ 你（究竟）要买哪一个？
Who（ever） told you such a foolish story？ (究竟）是谁讲给你这么蠢的事?
When(ever) can I enjoy a long vacation？ （究竟）什么时候才能给我放个长假呢？
Where（ever） did you leave your dictionary？ 你（究竟）把词典放哪儿了？
How（ever） did you collect so much money？ 你(到底）是怎样筹到这么多钱的？
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