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一般现在时代替完成时

时间：2016-11-16 00:03:30

（单词翻译:单击）

 　　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.

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1 since syswX     
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。