鲁教版八年级上英语语法课件.pptx

1、语法专项课件语法专项课件初中英语鲁教版八年级上册初中英语鲁教版八年级上册Unit 1语法专项课件语法专项课件（情态动词（情态动词could的用法）的用法）语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练情态动词三注意：情态动词表示说话人的语气或情绪情态动词无人称和数的变化情态动词后跟动词原形常见的情态动词：must,can,may,shall,could,might,should,will,would,need等。情态动词用法大观考点大观考点大观易错辨析易错辨析通关训练通关训练could2.表示过去一般的能力，意为“能、会”。1.

2、表示委婉请求，意为“可以”。3.表示猜测时，意为“可能”。Could you speak English then?Could I use your pen?You could be right,but I dont think you are.could的常见用法考点大观考点大观易错辨析易错辨析通关训练通关训练could的句式结构肯定句：could+动词原形否定句：could后加not（缩写为couldnt)一般疑问句：could提前I could speak English when I was three.I couldnt speak English when I was three.

3、Could you speak English when you were three?句式结构考点大观考点大观易错辨析易错辨析通关训练通关训练易错点cancould表示与生俱来的能力。表示过去拥有的一般的能力。表推测时，只用于否定句或疑问句中。表推测时，可用于肯定句、否定句以及疑问句。表示请求或允许。表示请求，语气更委婉。can 和 could的区别考点大观考点大观易错辨析易错辨析通关训练通关训练易错点can 和 could的区别Chicken cant swim in the river.He said he could see me next week.(can表与生俱来的能力）(cou

4、ld表示过去能够做某事）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点can 和 could的区别It cant be true.We could go there this summer.(表推测，can用于否定句）(表推测，不限句式）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点can 和 could的区别Can I use your pen?Could I use your pen?(can表请求）(could表更委婉请求）Yes,of course you can.注意：对请求、允许相关问句的回答，只能用can。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【

5、典例1】_ I borrow your dictionary?Yes,of course you _.A.Can;could B.Could;can C.May;can D.Could;could 考查情态动词。句意：我可以借用一下你的字典吗？当然可以。表示“委婉请求”选用could，需要用can来回答。故答案选B。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例2】That man must be Sarahs husband.No,he _be her husband.She is still single.A.cant B.mustnt C.may not D.couldn

6、t考查情态动词。句意：那个人一定是萨拉的丈夫。不，那不可能是她丈夫。她是单身。根据句意，表示确切的否定的推测选用cant，答案选A。Unit2 语法专项课件语法专项课件（提建议句型以及回答）（提建议句型以及回答）初中英语鲁教版八年级上册初中英语鲁教版八年级上册语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式1.Why dont you+动词原形 Why not+动词原形 意为“为什么不？”Why dont you have a picnic with us?Why not get him a book?考点大观考点

7、大观易错辨析易错辨析通关训练通关训练提建议的表达方式2.How about+名词、代词或动名词 What about+名词、代词或动名词 意为“怎么样？”How/What about this blue dress?How/What about going swimming?考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式3.Youd better(not)+动词原形 意为“你最好（不）做某事”。Youd better take off your coat.Its hot inside.考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式4.Lets+动词原形,sh

8、all we?意为“让我们，好吗？”。Lets take the children to the park,shall we?考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式5.Shall we/I+动词原形 意为“我们/我好吗？”Shall we go boating?Shall I open the window?考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式6.Would you like+名词或动词不定式 意为“你们/你想要吗？”。Would you like a cup of coffee?Would you like to go shopping

9、with us?考点大观考点大观易错辨析易错辨析通关训练通关训练提建议的表达方式7.Would you please+动词原形 意为“请你好吗？”。Would you please turn down the radio?考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1.同意对方的建议时，一般用：Good idea./Thats a good idea.好主意OK./All right.好的。Yes,please./Id love to.好的/我愿意。No problem.没问题。I agree with you.我同意你的观点。Sure./Of course./Certainly.当

10、然。Yes,I think so./I will.我想是这样的/我会的。回答建议的表达方式考点大观考点大观易错辨析易错辨析通关训练通关训练易错点Shall we go swimming?Good idea.回答建议的表达方式Would you like to have a drink?Yes,please.Id love to.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2.对对方的帮助或要求表示委婉拒绝时，一般用：I dont think so.我不是这样认为的。Sorry,I cant.对不起，我不能。Sorry,but抱歉，但是Id love/like to,but我很愿意去，

11、但是Im afraid恐怕回答建议的表达方式考点大观考点大观易错辨析易错辨析通关训练通关训练易错点Would you please go hiking with me?Id love to,but I have to have piano lessons.回答建议的表达方式Lets make it earlier,OK?Sorry,I cant.考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例1】Would you like to go to the Childrens Center to help this weekend?_.A.Thank you B.No,I cant C

12、.Sure,Id love to考查表建议句型。句意：你本周能来儿童中心帮忙吗？当然，我愿意。同意对方的建议时用Sure,Id love to等来回答。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例2】Its hot today.Why not go for a swim?_.Lets go.A.Good idea B.Thats right C.Not at all D.Well done考查表建议句型。句意：今天天很热，为什么不去游泳呢？好主意，让我们走吧。同意对方的建议时用Good idea等来回答。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例3】Cou

13、ld you please not run in the hallways?_.A.Sure.Ill do it right away B.No,not at all C.Sorry,I wont do it again考查表建议句型。句意：能不能不要再走廊里乱跑？抱歉，我不再乱跑了。对对方的帮助或要求表示委婉拒绝时，用Sorry等来回答。Unit 3语法专项课件语法专项课件（过去进行时）（过去进行时）语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练过去进行时定义过去进行时表示过去某一时刻或某一段时间内正在进行或发生的动作。考点大

14、观考点大观易错辨析易错辨析通关训练通关训练过去进行时的结构否定形式问句形式was/were+not+doing Was/Were+主语+doing?was/were+doingHe was sleeping at that time.He wasnt sleeping at that time.Was he sleeping at that time?肯定形式考点大观考点大观易错辨析易错辨析通关训练通关训练过去进行时标志词then,at that time,this time yesterday,at 5 oclock last night,all night,all the morning,

15、from 7:00 to 9:00 yesterdayThey were having a class this time yesterday.I was drawing a horse when the teacher came in.考点大观考点大观易错辨析易错辨析通关训练通关训练动名词变化规则口诀口诀规则规则例子例子直1.一般情况下，直接在动词后加-ing。play playing去2.动词以不发音的-e结尾，要去-e加-ing。take taking双3.重读闭音节的动词，要双写词尾字母，再加-ing。cut cutting变4.以-ie结尾的动词，把ie变成y再加-ing。lie-l

16、ying考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1when的用法when和while引导时间状语从句1.状语从句表示短时间的动作，主句常用进行时态或完成时态。When I came in,he was reading the newspaper.非延续性动词：come,go,leave,arrive,meet,die等。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1when的用法when和while引导时间状语从句2.状语从句表示长时间的动作或状态，主句常用进行时态。When she was making a call,I was writing a letter.考点

17、大观考点大观易错辨析易错辨析通关训练通关训练易错点1when的用法when和while引导时间状语从句3.表示突然发生某事，意思是“正在时突然”，主句常用过去进行时，when从句常用一般过去时。I was just coming along to see you when I ran into Wilson.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while的用法when和while引导时间状语从句1.主句和从句都用一般过去时。She listened carefully while he read.延续性动词：read,study,sleep,write,listen,wat

18、ch等。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while的用法when和while引导时间状语从句2.从句用过去进行时，主句用一般过去时。While I was watching TV,Tom came in.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while的用法when和while引导时间状语从句3.主句和从句都用过去进行时。While I was watching TV,she was doing some cleaning.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2用法不同过去进行时和一般过去时的区别过去进行时过去进行时一般过去时一般过去

19、时1.表示动作在持续或未完成。1.表示某一动作已经完成。2.表示动作反复地进行。2.表示只做一次动作。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2用法不同过去进行时和一般过去时的区别She was writing a letter to her friend at eight last night.She wrote a letter to her friend last night.(信不一定写完)(信写完了)She waved to me.She was waving to me.（挥了挥手）（反复挥手）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2标志词不同过去进行

20、时和一般过去时的区别过去进行时过去进行时一般过去时一般过去时过去时间点：at that time,this time yesterday,at 7 oclock yesterday evening等。过去时间点：just now,yesterday,this morning,three years ago等。过去时间段：from six to nine yesterday,from morning till night,all those days等。过去时间段：in the past,in+过去的年份,last week,once upon a time等。考点大观考点大观易错辨析易错辨析通

21、关训练通关训练易错点2过去进行时和一般过去时的区别We were having supper at this time yesterday.It was raining all those days.I was reading English while my mother was cooking breakfast.（过去进行时）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2过去进行时和一般过去时的区别I lived in Beijing three years ago.The first Olympic Games happened in 1896.Anny used to be

22、 short,but she becomes taller now.（一般过去时）考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例1】Little Tom _ computer games when his mother got home.A.is playing B.plays C.was playing D.playing考查时态。句意：当妈妈到家的时候，小汤姆正在玩电脑游戏。when引导时间状语从句，主句多用进行时，时间发生在过去，故用过去进行时。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例2】Turn off the water while you _

23、your teeth or washing your hands.A.were brushing B.brush C.are brushing D.brushed考查时态。句意：当你刷牙或洗手的时候，请关掉水龙头。while引导时间状语从句，时态保持一致，brushing与washing并列；习惯的动作，故选现在进行时。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例3】I called you at 8:00 yesterday evening,but no one answered.Sorry,I _ clothes at that time.A.wash B.washed

24、D.am washing D.was washing考查时态。句意：昨晚八点我打电话给你，但是没有人接。不好意思，那个时候我正在洗衣服。at that time为过去进行时标志词，选用was/were doing。Unit4语法专项课件语法专项课件（过去进行时（过去进行时VS一般过去时）一般过去时）语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练过去进行时定义过去进行时表示过去某一时刻或某一段时间内正在进行或发生的动作。考点大观考点大观易错辨析易错辨析通关训练通关训练过去进行时的结构否定形式问句形式was/were+not+doi

25、ng Was/Were+主语+doing?was/were+doingHe was sleeping at that time.He wasnt sleeping at that time.Was he sleeping at that time?肯定形式考点大观考点大观易错辨析易错辨析通关训练通关训练一般过去时定义一般过去时表示过去发生的动作或存在的状态，也表示过去经常或反复发生的动作。考点大观考点大观易错辨析易错辨析通关训练通关训练一般过去时的结构否定形式问句形式主语主语+didnt+动原动原+.主语主语+was/were+not+.Did+主语主语+动原动原+.?Was/Were+主语主

26、语+.?主语主语+动词过去式动词过去式+.主语主语+was/were+.I cleaned my room last week.I didnt cleaned my room last week.Did you cleaned your classroom last week?肯定形式考点大观考点大观易错辨析易错辨析通关训练通关训练易错点用法不同过去进行时和一般过去时的区别过去进行时过去进行时一般过去时一般过去时1.表示动作在持续或未完成。1.表示某一动作已经完成。2.表示动作反复地进行。2.表示只做一次动作。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点用法不同过去进行时和一般过去时

27、的区别She was writing a letter to her friend at eight last night.She wrote a letter to her friend last night.(信不一定写完)(信写完了)She waved to me.She was waving to me.（挥了挥手）（反复挥手）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点标志词不同过去进行时和一般过去时的区别过去进行时过去进行时一般过去时一般过去时过去时间点：at that time,this time yesterday,at 7 oclock yesterday even

28、ing等。过去时间点：just now,yesterday,this morning,three years ago等。过去时间段：from six to nine yesterday,from morning till night,all those days等。过去时间段：in the past,in+过去的年份,last week,once upon a time等。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点过去进行时和一般过去时的区别We were having supper at this time yesterday.It was raining all those d

29、ays.I was reading English while my mother was cooking breakfast.（过去进行时）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点过去进行时和一般过去时的区别I lived in Beijing three years ago.The first Olympic Games happened in 1896.Anny used to be short,but she becomes taller now.（一般过去时）考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例1】I _ tennis with my cous

30、in every day when I was in America.A.play B.played C.had played D.has played考查时态。句意：当我在美国的时候，我每天都跟我的堂哥一起打网球。根据句意可知，在过去经常做的事情，选用一般过去时。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例2】I didnt hear the phone because my father _ TV then.A.is watching B.was watching C.watched D.watches考查时态。句意：因为我爸爸那个时候在看电视，所以我没有听到电话。the

31、n那一刻，是过去进行时标志词，根据句意选用过去进行时结构was/were doing。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例3】Do you know who took the students to the old peoples home,Tony?Well,Mr.Smith _.A.took B.does C.did D.do考查时态。句意：托尼，你知道谁把这些学生带到敬老院了吗？恩，史密斯先生。根据问句可知，此事发生在过去，排除B/D。took后边缺少成分。Unit 5语法专项课件（形容词、副词的语法专项课件（形容词、副词的比较级和最高级）比较级和最高级）语法透

32、析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练形/副比较级、最高级定义两者比较用 3者用最高级，比较级，后接than 前加the 基本 用法Lily is taller than me.Tom is the tallest boy in our class.考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的构成比较级和最高级的构成规则变化规则变化规则原级比较级最高级（1）一般单音节词在词尾加-er和-estlongfastlongerfasterlongestfastest（2）以“e”结尾的单音节词在词尾加-r和-st

33、nicelatenicerlaternicestlatest考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的构成比较级和最高级的构成规则变化规则变化规则原级比较级最高级（3）重读闭音节，词尾只有一个辅音字母，须双写最后一个辅音字母，再加-er或-estbighotsadgladbiggerhottersaddergladderbiggesthottestsaddestgladdest（4）辅音字母+y结尾，变y为i，再加-er和-estheavyangryfunnyheavierangrierfunnierheaviestangriestfunniest考点大观考点大观易错辨析

34、易错辨析通关训练通关训练比较级和最高级的构成比较级和最高级的构成巧学妙记巧学妙记比较级要变化比较级要变化，一般词尾加，一般词尾加-er。词尾若有哑音词尾若有哑音e，直接加，直接加r就可以。就可以。一辅重读闭音节，辅音字母要双写。一辅重读闭音节，辅音字母要双写。辅音字母加辅音字母加y，要把，要把y改改i。最高级加最高级加-est，前面加，前面加the莫忘记。莫忘记。形容词若是多音节，只把形容词若是多音节，只把more,most前面写。前面写。考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的构成比较级和最高级的构成不规则变化不规则变化原级比较级最高级good/well好的bette

35、r更好的best最好的bad差的，ill坏的worse更差的；更坏的worst最差的；最坏的many/much多的more更多的most最多的little少的less更少的least最少的考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的构成比较级和最高级的构成不规则变化不规则变化原级比较级最高级old年老的；古老的older较老的；较旧的oldest最老的；最旧的；最年长的elder年长的eldest最年长的far远的farther（指距离）更远的farthest（指距离）最远的further（指距离和抽象概念）较深远的furthest（指距离和抽象概念）最深远的考点大观考点大

36、观易错辨析易错辨析通关训练通关训练比较级和最高级的常见用法比较级和最高级的常见用法原级原级句型例句(1)“as+形容词原级+as”，在否定句中用“not so.as”结构Lucy is not so tall as Lily.露西不如莉莉高。(2)倍数+as+形容词原级+asOur school is three times as big as theirs.我们的学校是他们的三倍大。考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的常见用法比较级和最高级的常见用法用法例句(1)双方比较，表示一方超过另一方时，用“比较级+than”结构China is larger than I

37、taly.中国比意大利大。(2)用于“less+原级+than”（注意此结构不用于单音节词）The book is less interesting than that one.这本书不如那本书有趣。(3)倍数+比较级+thanThe box is three times bigger than that one.这个箱子是那个的三倍大。比较级比较级考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的常见用法比较级和最高级的常见用法用法例句(4)“比较级+and+比较级”表示“越来越”Our country is becoming stronger and stronger.我们的

38、国家正变得越来越强大。(5)“the+比较级，the+比较级”表示“越，就越”The more,the better.多多益善。(6)the+比较级+of the two+名词复数The taller of the two boys is my brother.两个男孩中，较高的那一个是我的哥哥。比较级比较级考点大观考点大观易错辨析易错辨析通关训练通关训练比较级和最高级的常见用法比较级和最高级的常见用法用法例句(1)the+形容词最高级+名词+表示范围的短语或从句Spring is the best season of the year.春天是一年中最好的季节。(2)“one of the+最

39、高级+复数名词”表示“最之一”Kobe is one of the best basketball players in NBA.科比是NBA最好的篮球运动员之一。最高级最高级考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1形容词比较级前可用a lot/far/a bit/much/even/still等词来修饰，表示“得多”，“更”，“一些”。very,really,so,too,rather,pretty,quite等词后只能用原级。The problem is a lot more difficult than that one.这道题比那道题要难得多。He is so care

40、less that he loses the purse.他是如此粗心以至于弄丢了钱包。常见的用来修饰比较级的副词考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2(1)形容词最高级用于同自身不同场合相比较时不带the。例如：Im busiest on Mondays.我星期一最忙。(2)形容词最高级前有物主代词、名词所有格时，不带the。例如：Alice is the old mans youngest daughter.艾丽斯是这位老人最小的女儿。形容词最高级前不用the的情况考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2形容词最高级前不用the的情况(3)两个或多个形容词

41、的最高级并列使用，从第二个起，就不带the。例如：Bob is the youngest and tallest boy in our class.鲍勃是我们班最小也是最高的男孩。(4)形容词最高级在句中作宾语补足语时，常不带the。例如：I think grammar hardest in our English study.我认为在我们的英语学习中语法最难。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例1】Farmers have become _ in our hometown in recent years.A.more and more rich B.richer a

42、nd richer C.more rich and more rich考查形容词/副词比较级、最高级。“比较级and比较级”意为“越就越”，rich的比较级是richer。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例2】Lets go shopping at the new mall.Why not shop online?Its _.A.expensive B.more expensive C.less expensive D.the most expensive考查形容词/副词比较级、最高级。由句意可知答语应为“为什么不网上购物？它更便宜。”less expensive意

43、为“更便宜”。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例3】If there is _ pollution,the air in our city will be _ dirtier.A.less;more B.more;much C.less;less D.more;more 考查形容词/副词比较级、最高级。less与more常用来修饰原级构成比较级，但是不能修饰比较级。Unit6语法专项课件语法专项课件（现在完成时（现在完成时1）初中英语鲁教版八年级上册初中英语鲁教版八年级上册语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨

44、析通关训练通关训练现在完成时结构肯定句：主语+have/has+过去分词+.否定句:主语+havent(have not)+过去分词 主语+hasnt(has not)+过去分词.疑问句:Have/Has+主语+过去分词.?I havent finished my homework.Have you finished your homework?I have finished my homework.结构考点大观考点大观易错辨析易错辨析通关训练通关训练现在完成时三大用法用法用法11)表示到现在为止已经完成或刚刚完成的动作。By now,I have collected all the data

45、 I need.Now we have planted all the trees.考点大观考点大观易错辨析易错辨析通关训练通关训练现在完成时三大用法用法用法22)表示过去发生的动作,强调结果或对现在的影响。Someone has broken the window.I have just cleaned my hands.(窗户现在是坏的)(手是干净的)考点大观考点大观易错辨析易错辨析通关训练通关训练现在完成时三大用法用法用法33)表示从过去开始并持续到现在的动作或状态。She has learned English for 5 years.He has lived in Beijing s

46、ince he was born.考点大观考点大观易错辨析易错辨析通关训练通关训练过去式、过去分词(1)一般动词，在词尾直接加“ed”。work-worked-worked (2)以“e”结尾的动词，只在词尾加“d”。live-lived-lived(3)以“辅音字母+y”结尾的动词，将“y”变为“i”，再加“ed”。study-studied-studied (4)重读闭音节结尾，末尾只有一个辅音字母，先 双写该辅音字母，再加“ed”。drop-dropped-dropped 规则变化规则变化考点大观考点大观易错辨析易错辨析通关训练通关训练过去式、过去分词不规则变化不规则变化A.过去分词与过

47、去式形式一样havehadhad spend spentspent makemademade saysaidsaid findfoundfound hearheardheard meetmetmet leaveleftleft考点大观考点大观易错辨析易错辨析通关训练通关训练过去式、过去分词不规则变化不规则变化B.过去分词与过去式形式不一样taketooktaken speak spokespoken singsangsung drivedrovedriven bewas/werebeen gowentgone 考点大观考点大观易错辨析易错辨析通关训练通关训练过去式、过去分词不规则变化不规则变化

48、C.过去分词、过去式与动词原形一样cutcutcutput putput letletletreadreadread 考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2012started learning English2015learning3 yearshave learned EnglishI started learning English in 2012.I am learning English these days.I have learned English for 3 years.（一般过去时）（现在进行时）（现在完成时）现在完成时VS一般过去时考点大观考点大观易错辨

49、析易错辨析通关训练通关训练易错点现在完成时/一般过去时用法不同现在完成时一般过去时用法1：表示到现在为止已经完成的动作。用法1：表示过去某时发生的动作。用法2：表示动作发生在过去，对现在造成影响。用法2：表示过去存在的某种状态。用法3：表示动作开始于过去，一直持续到现在，并有可能继续持续下去。用法3：表示过去经常性发生的动作或状态。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点现在完成时/一般过去时用法不同I saw this film yesterday.I have seen this film.（一般过去时：强调动作）（现在完成时：强调影响）已经知道内容考点大观考点大观易错辨析易

50、错辨析通关训练通关训练易错点现在完成时/一般过去时结构不同现在完成时一般过去时肯定句：主语+have/has+过去分词+.肯定句：主语+过去式+.主语+was/were+表语否定句:主语+havent(have not)+过去分词+.主语+hasnt(has not)+过去分词+.否定句：主语+did not(didnt)+动词原形+was/were not（wasnt/werent)+表语疑问句:Have/Has+主语+过去分词.?疑问句：Did+主语+动词原形+Was/Were+主语+表语考点大观考点大观易错辨析易错辨析通关训练通关训练易错点现在完成时经典例句：I have been to