准备考试需要一点一滴的积累。坚持刷题，坚持备考！加油！以下为“大学英语六级基础语法知识整理”，欢迎阅读参考！
英语六级基础语法知识：
情态动词 have 过去分词
1) may(might) have done sth, can (could) have done sth表示过去，推测过去时间里可能发生的事情。 Philip may (might) have been hurt seriously in the car accident. Philip can (could) have been hurt seriously in the car accident.
2)must have done sth，对过去时间里可能发生的事情的推测，语气较强，具有"肯定"，"谅必"的意思。 ---Linda has gone to work, but her bicycle is still here. ---She must have gone by bus.
3) ought to have done sth, should have done sth 本应该做某事，而事实上并没有做。否定句表示"不该做某事而做了"。 You ought to (should) have been more careful in this experiment. He ought not to have thrown the old clothes away.(事实上已扔了。) ought to 在语气上比should 要强。
4) needn‘t have done sth 本没必要做某事 I dressed very warmly for the trip, but Ineedn‘t have done so. The weather was hot. 5) would like to have done sth 本打算做某事 I would like to have read the article, but I was very busy then.

零冠词 冠词和数词中零冠词的用法。
1) 国名，人名前通常不用定冠词：England，Mary;
2)泛指的复数名词，表示一类人或事物时，可不用定冠词; They are teachers. 他们是教师。
3)抽象名词表示一般概念时，通常不加冠词; Failure is the mother of success.失败乃成功之母。
4)物质名词表示一般概念时，通常不加冠词，当表示特定的意思时，需要加定冠词; Man cannot live without water.人离开水就无法生存。
5)在季节、月份、节日、 假日、日期、星期等表示时间的名词之前，不加冠词; We go to school from Monday to Friday. 我们从星期一到星期五都上课。
6)在称呼或表示官衔，职位的名词前不加冠词; The guards took the American to General Lee. 士兵们把这个美国人送到李将军那里。
7)在三餐、球类运动和娱乐运动的名称前，不加冠词 如：have breakfast，play chess
8)当两个或两个以上名词并用时，常省去冠词; I can‘t write without pen or pencil.没有钢笔和铅笔，我就写不了字。
9)当by 与火车等交通工具连用，表示一种方式时，中间无冠词;by bus，by train;
10)有些个体名词不用冠词;如： school，college，prison，market，hospital，bed，table，class，town，church，court 等个体名词，直接置于介词后，表示该名词的深层含义; go to hospital去医院看病 go to the hospital 去医院 (并不是去看病，而是有其他目的)
11)不用冠词的序数词; a. 序数词前有物主代词 b. 序数词作副词 He came first in the race. c. 在固定词组中 at (the) first,first of all,from first to last