2、点1、现在完成时一、定义：现在完成时表示的是在过去某个时间开始并持续到现在的动作/状态,或者过去的动作或状态对现在造成的影响或结果。 Idon’twanttoseethefilm,becauseIhaveseenitbefore也可表示持续到现在的动作或状态，或有可能有可能停止，或有可能继续延续下去。 He has learned English since 2001. 从2001年开始学的（,现在还在继续学着呢）二、.现在完成时的结构现在完成时的构成形式： have /has (助动词)+done(过去分词) I/You/They/We have
3、 talked . He/She has talked. 现在完成时的否定结构就是在助动词have或has后加上否定词not； I/You/They/We haven’t(have not) talked . He/She hasn’t(has not) talked. 文档实用标准其一般疑问句就是将助动词have或has提到句首， Have I/You/They/We talked . Has he/she talked. 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.。
4、如： I have seen the film. →Have you seen the film？ Yes， I have./No， I haven’t.三、现在完成时的标志 1、for+时段②since+过去一个时间点（过去从句）为标志.for 与since区别: for +时间段 since+ 时间点 I have lived in Changchun__________ two years. I have been here__________7 o'clock. Ihavestudi
5、edinthisschoolsinceIcametoChina用since和for填空 ______ two years 2._______ two years ago 3. _______ last month 4.______ 1999 2、already（肯定句）,yet（否定，疑问句）I have already finished my homework. already用在_______，位于_______。 “已经” Have you finished your homework yet? yet
6、用在_______和________中，位于_______。“仍然，已经” 3)so far(目前;迄今为止) up to now=till now=by now到现在为止；直到现在 recently 最近 by the end of…到…末/结束by the end of this year 到今年年末 by the end of this month到本月末 in the last /past months在过去的几个月中 in the past/last few days/years 在过去的这几天4、用于现在完成时的句型
7、1）It is the first / second time that+现在完成时。 2）It was the first / second time that+过去完成时文档实用标准 这是我第一次欣赏月光。 _________________________________________________________1） 用“It is/has been＋时间段＋since…”句型。如：It is/has been three years since I bought the book. (从买这本书起到现在已三年了) 四、跟一段时间连用表示持续
