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no matter的让步状语时态问题

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no matter的让步状语时态问题
主句现在时于将来时,no matter(who,what,how等)引导的让步状语用一般现在时,如果是过去时态呢?
比如I have made up my mind to finish the job,no matter how long it takes 主句应该是现在完成时吧(have made)?从句也用一般时态?
no matter的让步状语时态问题
引导让步状语从句的连词主要有以下这些:though,although,as; even if,even though; whether...or...; no matter+疑问词,疑问词-ever.下面对这些连词引导的让步状语从句作一说明.
(1)though,although表示“虽然,纵然”之意.
(2)as,though表示“虽然……但是”,“纵使……”之意.
(3)even if,even though 表示“即使……”,“纵使……”之意.
(4)whether...or...表示“不论是否……”,“不管是……还是……”之意.
(5)“no matter+疑问词”或“疑问词-ever”的含义为“……都……;不管……都……”,它们引导的让步状语从句可以互换.例如:
No matter what happened,he would not mind.(=Whatever happened,he would not mind.)无论发生了什么,他都不会介意的.
No matter what / which / who / where / when / whose+从句,+主句.(注意从句中的时态一般情况下用一般现在时态.)如:
No matter what you do,you must do it well.请比较:Whatever you do,you must do it well.无论你做什么,一定要做好.
No matter where you go,please let me know.请比较:Wherever you go,please let me know.你无论去哪儿,请通知我.
(说明:这两种句型形式不同,而意义完全相同.)
(注意:I will tell whoever would like to read it.句中的whoever不能用whomever来代替.因为它即作动词tell的宾语,又作后面从句的主语.)
No matter who you are,you must keep the law.(=Whoever you are,you must keep the law.不管你是谁,你都要遵纪守法.
但“no matter+疑问词”结构只能引导让步状语从句,而“疑问词-ever”还可以引导名词性从句.例如:
Whatever(=No matter what)you say,I won " t believe you.(Whatever 引导让步状语从句)无论你说什么,我都不会相信你.
I " ll eat whatever(≠no matter what)you give me.(whatever引导宾语从句)你给我吃什么,我就吃什么.
Whoever comes will be welcome.(Whoever 引导主语从句) 不管谁来都受到欢迎.
此外,有时while也可以引导让步状语从句,但一般要位于句首.例如:
While I like the colour,I don " t like the shape.我虽然喜欢那颜色,但不喜欢那形状.