Iamateacher.Ihavemanystudents.Yesterday,Ihad4lessons.Ialwayshelpsmystudentstosolveproblem.以上的句子都是一般现在时吗?它们有什么特征?1、Iamateacher.2、Heisastudent.3、Youareaboy.4、Icanswim.一般现在时(肯定句)哪些主语是第三人称单数?主语为第三人称单数,动词要按规则加上s或es,一、he,she,it是第三人称单数。HelikeswatchingTV.他喜欢看电视。Shehaslunchattwelve.她十二点吃午餐。Itlookslikeacat.它看起来像只猫。二、单个人名、地名或称呼作主语;是第三人称单数。HanMeilookslikehermother.韩梅看起来像她的母亲BeijingisinChina.北京在中国。UncleWangoftenmakescakes.王叔叔经常做蛋糕。Apandaisashyanimal.熊猫是害羞的动物。Thisbookisyellow.这本书是黄色的。Thatcarisred.那辆小汽车是红色的。Thecatisblack.这只猫是黑色的。三、单数可数名词或this/that/the+单数可数名词作主语时,是第三人称单数。动词+s的变化规则1.一般情况下,直接加-s,如:stop-stops,come-comes2.以s.x.sh.ch.o结尾,加-es,如:do-does,watch-watches,go-goes3.以“辅音字母+y”结尾,变y为i,再加-es,如:study-studies一般现在时(否定句)1、Iamateacher.否:Iamnotateacher.2、Heisastudent.否:Heisnotastudent.3、Youareaboy.否:Youarenotaboy.4、Icanswim.否:Icannot(can’t)swim.否定句在be动词和情态动词后加not一般现在时(否定句)无be动词或情态动词时主语第三人称单数动词前加doesnot(doesn’t)主语是非单三动词前加donot(don’t)一般现在时(否定句)1、Itoschoolbybus.否:Itoschoolbybus.2、Hetoschoolbybus.否:Hetoschoolbybus.godon’tgogoesdoesn’tgo用一般现在时态描述下yourgoodfriend——Mike一般现在时(疑问句)有be动词或情态动词时be动词或情态动词can提前,首字母变为大写;some变any一般现在时(一般疑问句)Heisastudent.Youareaboy.Isheastudent?Areyouaboy?Icanswim.Iamateacher.Canyouswim?Areyouateacher?一般现在时(一般疑问句)1、Itoschoolbybus.疑问句:youtoschoolbybus.2、Hetoschoolbybus.疑问句:hetoschoolbybus.DoesgogoesgogoDo特殊疑问句时间:when地点:where人:who物:what状态:how年龄:howold价钱:howmuch数量:howmany特殊疑问句有be动词或情态动词:疑问词+beor情态动词+主语+其它特殊疑问句ShecanspeakEnglish.Whatcanshespeak?Heisten.Howoldishe?Heisathome.Whereishe?It’s3dollars.Howmuchisit?特殊疑问句没有be动词或情态动词:疑问词+do(does)+主语+动词原形+其它特殊疑问句(时间)Hegoestoschoolatseven.Whendoeshegotoschool?单数第三人称:非单数第三人称:Igotoschoolatsix.Whendoyougotoschool?特殊疑问句(地点)Hehaslunchatschool.Wheredoeshehavelunch?单数第三人称:非单数第三人称:Childrenhavelunchatschool.Wheredochildrenhavelunch?特殊疑问句(状态)Hegoestoschoolbybus.Howdoeshegotoschool?单数第三人称:非单数第三人称:Wegotoschoolbybus.Howdoyougotoschool?