一般现在时代替完成时

一般现在时 时间:2019-03-13 动词 

  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.