一般现在时动词变化规律.pptx
时态概念。时态概念。英语句子的时态是指在不同时英语句子的时态是指在不同时间里发生的动作或存在的状态,要间里发生的动作或存在的状态,要用动词的不同形式表示出来。用动词的不同形式表示出来。第1页/共16页时态:1、这种时态的用法。(即何时用这种时态。)2、这种时态的构成。第2页/共16页(一般现在时用法一般现在时用法)I have long hair.My hair is long.things that are true now.目前存在的事实目前存在的事实Simon plays football after school.things that we do regularly.经常做的事经常做的事Cats eat fish.things that are always true.客观存在的事实客观存在的事实第3页/共16页一一.当我们谈论以下几种情况时当我们谈论以下几种情况时,用一用一般现在时:般现在时:1.表示现在存在的状态表示现在存在的状态;2.表示经常性、习惯性的动作表示经常性、习惯性的动作;3.表示客观事实或普遍真理。表示客观事实或普遍真理。句中常用句中常用always,usually,often,sometimes,seldom,never,every day,in the morning等等时间状语。时间状语。第4页/共16页一般现在时的构成:一般现在时的构成:My name is Amy.He is ten years old.-be动词的一般现在时。I often play football after school.He watches TV every day.-行为动词的一般现在时动词的种类第5页/共16页行为动词的一般现在时的构成:(看例句并总结规律,行为动词的一般现在时的构成:(看例句并总结规律,注意观察红色和蓝色字体。)注意观察红色和蓝色字体。)1、I play football every day.2、You play football every day.3、My friends play football every day.4、He plays football every day.5、Tom plays football every day.6、My brother plays football every day.第6页/共16页总结规律:1.一般在词尾加-s,清辅音后读作s,浊辅音和元音后读作z。如:动词第三称单数:help(helps),play(plays)2.以s,x,ch,sh结尾的词,在词尾加-es,原词尾已有e,一般只加-s都读作iz。如:动词第三人称单数:wash(washes),close(closes)3.以辅音字母加-y结尾的词,先变y为i,再加-es,读作iz。如:动词第三人称单数:fly(flies),study(studies)第7页/共16页 写出下列行为动词的第三人称单数形式:1.like-2.swim 3.work4.catch 5.go-6.study7.worry 8.have-9.do-likesswims workscatches goesstudiesworries hasdoes第8页/共16页1.I _(go)swimming on Sunday.2.My cousin_(enjoy)computer games.3.My parents_(watch)TV.4.Tom and Simon _(like)fish.5.He _(swim)every day.6.Tom_(play)football every day.gowatchlikeswimsplaysenjoys用所给词的适当形式填空第9页/共16页行为动词一般现在时的否定句和一般疑问句。1、I speak English.否定句:I do not/dont speak English.一般疑问句:Do you speak English?肯定回答:Yes,I do.否定回答:No,I dont.2、He speaks English.否定句:He does not/doesnt speak English.一般疑问句:Does he speak English?肯定回答:Yes,he does.否定回答:No,he doesnt.(注意蓝色和红色字体,总结规律。第10页/共16页行为动词一般现在时的否定句和一般疑问句构成:否定句:在行为动词前加do not或does not,当主语是第三人称单数时,助动词用does.在非正式行文中,do not和does not可以缩写成dont 和doesnt.一般疑问句:在句首加助动词do和does,当主语是第三人称单数时,助动词用does.注意:在疑问句和否定句中,助动词之后的行为动词均用原形。第11页/共16页改错题:改错题:1.I goes to school at six every day.2.He dont like playing football.3.I am watch TV every day.4.Daming watchs TV in the evening.5.Does he usually has a party?6.Our English doesnt likes music.7.Tony goes always to school at eight oclock.8.Does your parents like watching TV?9.Lily haves lunch at school.10.My sister doesnt her homework every._ _godoesnt去掉amwatcheshavelikealways goes_dohasdoesnt do注意:我们用一般现在时进行表达时,注意:我们用一般现在时进行表达时,不能同时使用不能同时使用be动词和行为动词动词和行为动词第12页/共16页行为动词一般现在时的构成:(小结)肯定句:当主语是第三人称单数时,行为动词用 。主语是非第三人称单数,行为动词用 。否定句:在行为动词前加 ,当主语是第三人称单数时,助动词用在非正式行文中,do not和does not可以缩写成dont 和doesnt.一般疑问句:在句首加助动词 ,当主语是第三人称单数时,助动词用 .注意:在疑问句和否定句中,助动词之后的行为动词均用原形。三单形式does原形do not或does notdo和doesdoes第13页/共16页句型转换:1、把下面句子改成一般疑问句并做肯定和否定回答。2、改为否定句。He watches TV every day.2.I do my homework every day.3.Lucy and Lily come from the USA.4.She eats eggs every morning.5.They do a lot of homework every day.6.Im from Nanjing第14页/共16页动词的种类:1、行为动词行为动词:含有实在的意义,表示动作或状态,在 句中能做谓语。例句:I often play football after school.He watches TV every day.I listen to the radio every day She has a sister.We like playing football.2、连系动词连系动词 例句:He is ten years old.I feel happy.3、助动词助动词 例句:Do you have a sister?He doesnt speak English.4、情态动词 例句:We must go now.She can speak English.第15页/共16页谢谢您的观看!第16页/共16页