2009年12月大学英语四六级考试语法精要(六)

　　So long as you work hard, you will surely achieve good results in examinations.

　　I shall return next Thursday unless something unexpected happens.

　　I will go provided that you go with me.

　　Please give this letter to John in case he comes.

　　3) 让步状语从句

　　让步状语从句主要由以下连词引导：though, although, even if, even though, whatever, however, whoever, wherever, no matter how/ what/ where/ when等。以下介绍几种较特殊的让步状语从句。

　　(1) while引导的让步状语从句多放在句首，while相当于although，表示“尽管”，“虽然”。

　　While I admit I did it, I didn’t intend to.

　　While I understand what you say, I can’t agree with you.

　　(2) 短语“even now/then/so”相当于“though it is/was true”，表示“尽管如此”，“尽管这样”。

　　The fire was out, but even so, the smell of smoke was strong.

　　I’ve tried my best, but even now/then she is not satisfied.

　　(3) as引导的让步状语从句要倒装。

　　Child as he was, he could speak four languages.

　　Hard as she tried, she failed to get the job.

　　4) 比较状语从句

　　比较状语从句主要由以下连词引导：(not) as … as, (not) the same as, (not) such … as, not so … as, than, the + 比较级…, the +比较级…等。

　　We have had a lot more rainfall this year than we had last year.

　　She can speak English as fluently as her teacher (can).