精选优质文档-倾情为你奉上现在完成时一、 现在完成时态的结构 have /has (助动词)+done(过去分词)说明: 动词的过去分词有规则形式和非规则形式两种,非规则分类:AAA、ABB、ABA、ABC AAA cost-cost-cost,hit-hit-hit,let-let-let,ABB buy-bought-bought,catch-caught-caught, ABA come-came-come,become-became-become ,run-ran-runABC break-broke-broken,fly-flew-flown,ride-rode-ridden ,take-took-taken,二、现在完成时态的基本句式 肯定句:主语+have/has+Vpp+其他否定句:在助动词have/has后加上否定词not一般疑问句:将助动词have或has提到句首,肯定的简略回答是:Yes,主语have/has. 否定的简略回答是:No,主语have/has not.特殊疑问句:特殊疑问词+一般疑问句三、现