英语人教版八年级下册现在完成时总结复习.docx

八下英语unit8 unit10复习教案现在完成时态（Present Perfect Tense）构成：have/has + 过去分词 否定：have not/havent(has not/hasnt) + 过去分词 疑问：have/has + 主语 + 过去分词 肯定回答：Yes, 主语 have/has 否定回答：No, 主语 havent/hasnt1、意义：现在完成时表示过去发生的某一动作对现在造成的影响或结果。常常搭配的时间状语：already just never ever yet before例：i have already finished my homework.He has never come to New York before.Have you decided which one to choose yet?现在完成时和一般过去时的区别： 现在完成时表示过去发生的某一动作对现在造成的影响或结果，强调的是现在的情况，所以它不能和过去的时间状语连用，例如: yesterday, last night, three weeks ago等。而一般过去时只表示过去发生的动作，与现在没有关系，它可以和上面的这些时间状语连用。例如： I have seen the film.我看过这部电影(我了解这部电影的内容) I saw the film last week.我上周看过这部电影（只说明过去看过这个事实，不涉及现在的情况）2、 have been to (a place) 现在完成时可以表示去过某地，且可以表示频率。 例如：i have been to the space museum twice. Have you ever been to an amusement park? Jenny has never been to the zoo before.辨析：have been to & have gone to Have been to表示“曾经到过某地”，其后可以跟表示频率的副词，而have gone to则表示“已经去某地了”，不可以表频率。例如： She has been to Shanghai.她去过上海（她已经不在上海了） She has gone to Shanghai.她到上海去了（她可能在去上海的路上，或者已经到了上海，总之现在不在说话人这里）3、 某些动词的现在完成时可以表示过去某一时间开始一直持续到现在（包括“现在”在内）的动作或状态，可以和表示延续的时间状语连用。（多用for,since）例如： Ive known Bob for three years. He has been at this school for over two years. They have lived here since 1996. I have worked in this factory since six years ago. Miss Li has taught us since i came to this school.延续性动词与短暂性动词：有些动作可以一直持续进行，可以和表示一段时间的状语连用，称为延续性动词，如live,learn,teach,know等等；而有些动词则是在瞬间完成的，不能持续，也不能和表示时间段的状语连用，称之为短暂性动词，也叫非延续性动词，如go,come,arrive,leave,finish等。如果句子中有表时间段的状语，需将动词转化为相应的延续性动词形式。部分短暂性动词向延续性动词的转化：borrow - keepBuy -haveLeave -be away fromJoin - be inFinish - be overArrive - be (in/at)Die - be deadBegin - be onOpen - be openClose - be closed八年级英语现在完成时巩固练习I.按要求转换下列各句，每空一词。1、He has already finished his homework.(改为否定句)He _ finished his homework _.2.They have found the lost books already.(改为一般疑问句，并作否定回答)_ they _ the lost books _?No，they_.3.Julia has not got home from school yet.(改为肯定句)Julia _ _ _ home from school .4.You have never been to Shanghai before，_ _ ?(改为反意疑问句)5. Hes gone to Beijing, _ _?(改为反意疑问句)6.Mr Wang began to teach English in this school in 1999.(改为同义句)Mr Wang _ _ English in this school since 1999.7. He hasnt left home for 3 days.(同义句)He _ _ _ home for 3 days.8. They have lived here since 3 years ago. (对划线提问)II.选择正确答案。( )1.Who is Mary ?_?I saw you talking with her at the meeting .A.Dont you meet her yetB.Didnt you met her yetC.Havent you met her yetD.Hadnt you met her yet( )2.How do you like Beijing ，Mr Black?Oh ，I _ such a beautiful city .A.dont visitB.didnt visitC.havent visitedD.hadnt visited( )3.The old people _ lonely at all since we began to visit