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.
初中英语语法大全:一般现在时代替进行时
1) 句型:Here comes ; There goes
Look, here comes Mr. Li.
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