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 … since¹…"代替"It has been … since …"

　　3) It is (= has been) five years since we last met.

1 since   

adv.后来；conj.既然，因为，自从；prep.自从

参考例句：

• He's been working in a bank since leaving school.自从毕业后，他就一直在一家银行工作。
• I have known him ever since I was a child.我自孩提时代起就已经认识他了。