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现在完成时知识点讲解
一、现在完成时定义.从的动作或状态一直持续到,有可能继续下去1的动作对造成的影响
2.注意现在完成时是(双/单)时间概念,强调过去和现在的某种联系;一般过去时是讲述的动作或状态,与现在(有/无)关例
①()We studyEnglish six years ago.2we(study)English forsixyears.3I(have)breakfast thismorning.4I(have)breakfast,so nowIm nothungry.
二、过去分词的构词法.规则变化同动词过去时规则变化1
①一般情况下词尾直接加;ed
②以不发音字母结尾的直接加;e d
③以辅音字母结尾的变为再加;+y yi ed
④以重读闭音节结尾,且末尾只有一个辅音字母的双写尾字母加edo.不规则变化参考表格2
三、句式结构⑴肯定式___________________________________________________________________()They workin Suqianfor tenyears.()He stayin Suqian since
2020.⑵否定式将以上两个句子改为否定⑶疑问式___________________________________________________________________将以上两个句子改为一般疑问句,并做肯定和否定回答缩写I have=you have=he has=she has=it has=They have=we have=have not=has not=__________★易错点,几种反义疑问句
①He hasto stayat home,he
②he hascome here,he
③,He snever latefor school,he
④飞He neverbeen toBeijing,he
四、时间状语表示过去对现在的影响,用“八单”和“几次”
1.
①八个单词(肯定句、句中、句末)、(句中)、(句中)、(句中)、already neverever justbefore(句末)、(句末)、(句末)、(否定句、句末)recently latelyyet
②儿次数字(三次及以上)once/twice/+times表示过去发生的,一直持续到现在用关键”
2.“2例子:翻译句子他在这儿已经工作年了5He hasworked herefive years.He hasworked here
2018.He hasworked herefive years ago.He hasworked herehe cometo Suqianin
2018.“二关键”是指两个词语+时间段用“”提问+过去的时间点/…一般过去时的句子★重要句型主句现在完成时从句一般过ago/+since+去时.其他的时间状语3至今为止up tonow,so farin/over/during theseyears...in/over/during thepast/last years...in afew days/weeks...
五、三句型have/has goneto sp._______________________________________have/has beento sp.________________________________________have/has been in sp.________________________________________例子:翻译并比较一下句子
①.他去过北京了HeBeijing
②.他去了北京了HeBeijing
③.他一直在北京HeBeijing
六、长短动作之间的转换“表示持续的一段时间”的短动作必须改为长动作例题判断下列两个句子的对错,并把错误的句子改为正确的1He hasleft.He hasleft forthree years.后面加的是时间段,时间段对应的是动作,而是动作,故需for/since leave要把改为leave例题用括号里所给动词的适当形式填空
21.Helive inSuqiansince he wasborn.
2.Shestudy Englishfor5years.
3.Hestay inNanjing since
1990.
4.Tombuy thebook3days ago.
5.Tombuy thebook for3days.
6.Sheborrow thebook three years ago.
7.Sheborrow thebook sincethreeyears ago.
8.Sheleave Shanghai2years ago.
9.Sheleave awayfrom Shanghai since2yearsago.
10.The dogdie2days ago.
11.The dogdiefor2days.
12.Shereach Beijing3days ago.
13.Shereach Beijingsince3days ago.
14.The filmendan hourago.
15.The filmendfor an hour.
16.The filmstartanhourago.
17.The filmstartfor anhour.
18.The shopopentwo yearsago.
19.The shopopensince twoyearsago.★结论⑴“已长不变请保持”;stay/live/study...,两单全变请注意「2“buy borrow⑶“其他借助形、介、副”be+〉leave sp.die---------------openclosestart/begin------end/finish------arrive in/at/get to/reach sp.fall asleep----
七、特例某些固定句型序数词现在完成时的句子Dlt isthe++time+that+It isthe firsttime that I havebeen here.⑵最高级+名词+现在完成时的句子It/This isthe+adj.It/This isthe mostinteresting filmthatIhave everseen.⑶主句现在完成时从句一般过去时+since+“一段时间+从句一般过去时=Tt is/It hasbeen++since”=一段时间从句一般过去时+since+has passed+since+He hasbeeninShanghaisincehe went to Shanghai2months ago.It is/It hasbeen2months sincehewent toShanghai.Two monthshas passedsincehewenttoShanghai.。