现在完成时 The Present Perfect Tense一、构成:have/has+动词过去分词①述句肯定形式。主语+ have/has+ 过去分词+其它eg. I have had lunch.已经吃过午饭了。??????? He has gone to Beijing. 他去了。 上一页下一页主菜单? 现在完成时的基本句型 ②述句否定形式。主语+ have/has+ not+过去分词+其它（在助动词have/has后+not，可缩写为haven’t/hasn’t）eg.? I haven’t had lunch. 我还没吃饭??????????? He hasn’t gone to Beijing. 他还没有去。③一般疑问句形式及其答语。Have/Has+主语＋过去分词＋其它（将助动词have/has提前，句末加问号） 肯定回答：Yes , 主语＋ have/has. 否定回答：No , 主语+haven’t/hasn’t.－Has he gone to Beijing? －Yes, he has?./?No, he hasn’t.上一页下一页主菜单④特殊疑问句形式（疑问词+一般疑问句）??特词+ have/has+主语＋过去分词＋其它？eg. Where has he gone? ?他去了哪里？（改为否定句和一般疑问句并肯否回答) I have read Little Woman. →I haven’t read Little Woman .→Have you read Little Woman?不规则动词原型-过去式-过去分词形式：1） AAA型(三种都一样)如：cost cost cost cut cut cut hurt hurt hurt shut shut shut set set set 2）ABB型(过去式与过去分词相同) 如: bring-brought-brought catch caught caught lead led led 3） ABC型(三种都不一样) 如：begin-began-begun take took taken ring rang rung do did done go went gone 4）ABA型(原形与过去分词相同) 如: come-came-come become became become run ran run 二、含义:(定义一)表示过去发生的动作或事情对现在的影响 |
