though, although 注意： 当有though, although时，后面的从句不能有but，但是 though 和yet可连用 Although it's raining, they are still working in the field.　虽然在下雨，但他们仍在地里干活。 He is very old, but he still works very hard.　虽然他很老，但仍然努力地工作。 Though the sore be healed, yet a scar may remain. 伤口虽愈合，但伤疤留下了。 （谚语）

典型例题 1） ___she is young, she knows quite a lot.　 A. When　B. However　 C. Although　 D. Unless 答案：C。意为虽然她很年轻，却知道许多。

2)as, though 引导的倒装句 as / though引导的让步从句必须表语或状语提前（形容词、副词、分词、实义动词提前）。 Child as /though he was, he knew what was the right thing to do. = Though he was a small child, he knew what was the right thing to do.

注意： a.　句首名词不能带任何冠词。 b.　句首是实义动词，其他助动词放在主语后。如果实义动词有宾语和状语，随实义动词一起放在主语之前。 Try hard as he will, he never seems able to do the work satisfactorily. = Though he tries hard, he never seems… 虽然他尽了努力，但他的工作总做的不尽人意。

3)ever if, even though.　即使 We'll make a trip even though the weather is bad.

4) whether…or-　 不管……都 Whether you believe it or not, it is true.

5)"no matter +疑问词" 或"疑问词+后缀ever" No matter what happened, he would not mind. Whatever happened, he would not mind. 替换：no matter what = whatever no matter who = whoever no matter when = whenever no matter where = wherever no matter which = whichever no matter how = however 注意：no matter 不能引导主语从句和宾语从句。 （错）No matter what you say is of no use now. （对）Whatever you say is of no use now. 你现在说什么也没用了。(Whatever you say是主语从句) （错）Prisoners have to eat no matter what they're given, （对）Prisoners have to eat whatever they're given.　囚犯们只能给什么吃什么。 

比较only+现在分词（短语）和only+不定式（短语）：这两个结构在句中都可以用来表示结果。但有区别：后接现在分词往往表示一种自然的合乎逻辑的结果，而后接不定式往往表示一种出乎意料的或令人...[阅读全文]

㈠ 分词或分词短语作状语时，可以表示 时间、原因、条件、让步（可转换成相应的状语从句） ① Put into use in April 2000, the hotline was meant for residents reporting water and heating ...[阅读全文]