引導(dǎo)讓步狀語從句的連詞主要有以下這些：though, although, as; even if, even though; whether...or...; no matter+疑問詞,疑問詞-ever.下面對這些連詞引導(dǎo)的讓步狀語從句作一說明.
（1）though, although表示“雖然,縱然”之意.
這兩個連詞意思大致相同,在一般情況下可以互換使用.在口語中,though較常使用,although比though正式,二者都可與yet, still或nevertheless連用,但不能與but連用.例如：
Though/Though he was worn out, (still) he kept on working. 雖然他已經(jīng)精疲力竭了,但仍然繼續(xù)工作.
Although/Though he is very old, (yet)he is quite strong. 他雖然年紀大了,身體還很健壯.
值得注意的是,although引導(dǎo)的讓步狀語從句位于主句之前的情況較多,though引導(dǎo)的讓步狀語從句可位于主句之前或主句之后.例如：
She passed the examination though she had not studied very hard. 她雖然不用功學(xué)習(xí),考試卻及格了.
（2）as, though表示“雖然……但是”,“縱使……”之意.
as引導(dǎo)的讓步狀語從句必須以部分倒裝的形式出現(xiàn),被倒裝的部分可以是表語、狀語或動詞原形,though間或也用于這樣的結(jié)構(gòu)中,但although不可以這樣用.例如：
Object as you may, I " ll go.(=Though/Although you may object, I " ll go.) 縱使你反對,我也要去.
Hard as/ though he works, he makes little progress. (=Though he works hard, he makes little progress.)盡管他學(xué)習(xí)很努力,但幾乎沒取得什么進步.
Child as/though he was, he knew what was the right thing to do.（=Though he was a child, he knew what was the right thing to do.）雖然他是一個孩子,但他知道該做什么.
Fast as you read, you can " t finish the book so soon. 縱然你讀得快,你也不能這么快讀完這本書.
（3）even if, even though 表示“即使……”,“縱使……”之意.
這兩個復(fù)合連詞的意思基本相同.它們?？苫Q使用,但意義有細微差別.even if引導(dǎo)的讓步從句含有強烈的假定性,而even though引導(dǎo)讓步狀語從句時,是以從句的內(nèi)容為先決條件的,也就是說,說話人肯定了從句的事實.例如：
We " ll make a trip even if/though the weather is bad. 即使天氣不好,我們也要作一次旅行.
Even if he is poor, she loves him. (=He may be poor, yet she loves him.)即使他很窮,但她還是愛他.
Even though he is poor, she loves him. (=He is poor, yet she loves him. )盡管他很窮,但她還是愛她.
（4）whether...or...表示“不論是否……”,“不管是……還是……”之意.
由這一個復(fù)合連詞引導(dǎo)的讓步狀語從句旨在說明正反兩個方面的可能性都不會影響主句的意向或結(jié)果.例如：
You " ll have to attend the ceremony whether you " re free or busy. 不管你忙不忙,都要參加這個典禮.
Whether you believe it or not, it " s true.無論你是否相信,這都是真的.
（5）“no matter+疑問詞”或“疑問詞-ever”的含義為“……都……；不管……都……”,它們引導(dǎo)的讓步狀語從句可以互換.例如：
No matter what happened, he would not mind. (=Whatever happened, he would not mind.)無論發(fā)生了什么,他都不會介意的.
No matter who you are, you must keep the law.(=Whoever you are, you must keep the law.不管你是誰,你都要遵紀守法.
但“no matter+疑問詞”結(jié)構(gòu)只能引導(dǎo)讓步狀語從句,而“疑問詞-ever”還可以引導(dǎo)名詞性從句.例如：
Whatever(=No matter what)you say, I won " t believe you. (Whatever 引導(dǎo)讓步狀語從句)無論你說什么,我都不會相信你.
I " ll eat whatever(≠no matter what)you give me. (whatever引導(dǎo)賓語從句)你給我吃什么,我就吃什么.
Whoever comes will be welcome. (Whoever 引導(dǎo)主語從句) 不管誰來都受到歡迎.
此外,有時while也可以引導(dǎo)讓步狀語從句,但一般要位于句首.例如：
While I like the colour, I don " t like the shape.我雖然喜歡那顏色,但不喜歡那形狀.
綜上所述,我們可以看出,學(xué)習(xí)讓步狀語從句的關(guān)鍵是關(guān)聯(lián)詞的選用；其次,要注意的是由as引導(dǎo)的讓步狀語從句要用倒裝語序.
參考資料：http://zhidao.baidu.com/question/28406545.html?si=2
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