大学英语四级语法部分虽不单独设题，但贯穿于听、读、写、译各题型中。扎实的语法基础，是达成全方位突破的首要条件。新东方在线整理了2025年12月英语四级常考语法，供各位考生参考。
2025年12月英语四级常考语法
1) 时间状语从句
时间状语从句主要由以下连词引导：when, whenever, as, while, since, until, till, before, after, as soon as, once, hardly …when, no sooner …than。
I will discuss the matter with you when we meet tomorrow.
时间状语从句还可由某些可充当连词的名词和副词引导：
I will tell you the news the instant I know.
Note:
①before除去可表示“在…之前”外，还可用来强调主句所表达的时间、距离非常长或花费的力量相比较大，可译为“…才”。。
It was a long time before I got to sleep again.
②假如坐落于when引导的分句之前的主句用过去进行时、过去完成时或“was/were about to, was/were on the point of”等结构时，when表示忽然发生某事，可译为“正在…忽然”或“刚…就”等。这个时候，不可以够用as或while来代替when。
I was walking on the street when I ran into my old friend John.
2) 条件状语从句
条件状语从句主要由以下连词引导：if, unless, providing/provided , suppose/supposing , on condition , as/so long as, in case等。
So long as you work hard, you will surely achieve good results in examinations.
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。
while引导的让步状语从句多放在句首，while等于although，表示“尽管”，“虽然”。
While I admit I did it, I didn’t intend to.
短语“even now/then/so”等于“though it is/was true”，表示“尽管这样”，“尽管如此”。
The fire was out, but even so, the smell of smoke was strong.
as引导的让步状语从句要倒装。
Child as he was, he could speak four languages.
4) 比较状语从句
比较状语从句主要由以下连词引导： as …as, the same as, 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.
以上就是新东方在线大学英语四级频道为大伙收拾的“2025年12月英语四级常考语法”，期望大伙可以更好的学会大学英语四级语法攻略，提升大学英语四级水平。
