摘要：24 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 he will go to London. I forget how old he is. 2) 句型 " It is - since-"代替"It has been - since -" 3) It is five years since we last met.

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