小升初必备语法：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.