四六级考试中单独考察的题型几乎是没有的,但是语法知识点却贯穿整张试卷,下面小编为大家整理了基础语法知识,希望可以为大家带来帮助,一起来学习一下吧。
英语知识:一般现在时代替完成时
1) 有些动词用一般现在时代替完成时:
hear, tell, learn, write , understand, forget, know, find , say,remember.
I hear (= have heard) he will go to London.
I forget (=have forgotten) how old he is.
2) 句型 " It is … since…"代替"It has been … since …"
3) It is (= has been) five years since we last met.