一般现在时讲解及练习1.一般现在时：1.表示事物或人物的特征、状态。
如：The sky is blue.天空是蓝色的。
2.表示经常性或习惯性的动作。
如：I get up at six every day.我每天六点起床。
3.表示客观现实。
如：The earth goes around the sun.地球绕着太阳转。
2.构成：1. be动词：主语+be(am,is,are)+其它。
如：I am a boy.我是一个男孩。
2.行为动词：主语+行为动词(+其它)。
如：We study English.我们学习英语。
当主语为第三人称单数(he, she,it)时，要在动词后加"-s"或"-es"。
如：Mary likes Chinese.玛丽喜欢汉语。
注意：一般现在时经常和频率副词连用。
3.我的变化--否定句、一般疑问句、特殊疑问句：1. be动词的变化。
否定句：主语+ be + not +其它。
如：He is not a worker.他不是工人。
一般疑问句：Be +主语+其它。
如：-Are you a student?-Yes. I am. / No, I'm not.特殊疑问句：疑问词+一般疑问句。
如：Where is my bike?2.行为动词的变化。
否定句：主语+ don't( doesn't ) +动词原形(+其它)。
如：I don't like bread.当主语为第三人称单数时，要用doesn't构成否定句。
如：He doesn't often play.一般疑问句：Do( Does ) +主语+动词原形+其它。
如：- Do you often play football?- Yes, I do. / No, I don't.当主语为第三人称单数时，要用does构成一般疑问句。
如：- Does she go to work by bike?- Yes, she does. / No, she doesn't.特殊疑问句：疑问词+一般疑问句。
如：How does your father go to work?动词第三人称单数形式构成规则动词原形变第三人称单数的规则与发音规律同名词单数变复数大致相同，请认真观察。
1、大多数动词在词尾加“S”在清辅音后发音为[s]，在浊辅音及元音后发音为[z]。
如：①stop－stops [s] make－makes [s]②read－reads [z] play－plays [z]2、以辅音字母加“y”结尾的，要先将“y”变为“i”，然后在加“es”读[iz] 如：fly－flies [z] carry－carries [z]study－studies [z] worry－worries3、以“s, x, ch, sh”结尾的，在词尾加“es”，发音为[iz] 如：teach－teaches [iz] watch－watches [iz]4、以“o”结尾的动词，加“es”，读[z] 如：go－goes [z] do－does [z下面几个动词变为单数时，原词的元音部分的发音发生了较大的变化，请注意记忆。
如：1）、do [du:]－does [dz]2）、say [sei]－says [sez]以不发音字母“e”结尾的开音节词，如果尾音是[s]，[z]时，加“s”后字母“e”发音，与所加“s”一起读做[iz]。
如： close－closes [iz]be动词包括：am， is， are。
第三人称单数用 is；过去式为 was；复数are，过去式为were. have，遇到主语是第三人称单数时，要用 has；动词 be 的第三人称单一般现在时练习题(一)写出下列动词的第三人称单数形式：drink--___________ go-- _____________ stay-- ____________ make--___________ look--__________ carry--___________ come-- ___________ watch--___________ plant--_____________ fly --_____________ do--______________ sit--______________ guess--_____________die--______________go--______________rush-- __________reach--_____________touch--_____________brush--____________fly-- _____________copy-- ____________say-- _____________run--______________do-- ______________fix-- _____________live--______________cry--______________enjoy--_____________have--_____________wish--_____________play--_____________teach-- ___________buy--_____________study-- ___________(二)用所给词的正确形式填空。
1.What_____(do)Alice find?2.Which toy_____(do) she like?3.He doesn’t______(know)her name.4.Where _____(do)Grandma live?5.The boy_______(chase) it.6.Grandma Wang___(live) in Pudong.7.When ______(do)he get up?8.Kitty______(watch)TV everyday.9.John can’t_______(find) his watch.(三)选择题1.Jack and her mother _____happy.A.doesB.areC.isD. have2..Her mother ______the beanstalk.A.takeB.is take Ctakes D. taking3.The woman_______the beanstalk.A.cutB.cuttingC.are cutD.cuts4.The goose_______golden eggs.yysyedyes5.Supergirl and Superdog______them.A.savesB.saveC.savingD.is saving6.Ben_____a new bicycle.A.haveB.hasC.areD.were7. A man _____in front of his car.A.walkB.walksC.walkingD.work8.How _____it feel?A.doesB.doC.areD.is9.-He came early this morning, didn't he?-Yes, he did. He often___ to school early.A. comeB. comesC. cameD. has come10.Ann ____ her hair every week.A. is going to washB. washC. washesD. is washing11.They usually_____TV in the evening.A. watchB. will watchC. are watchingD. watches12.The sun ___ in the east and___ in the west.A. raises; setB. rise; setsC. rises; setsD. rises; set13.-I usually have milk and bread for breakfast. What about you, Jim? -So do I, but my sister ___.A. hasn'tB. doesn'tC. didn'tD. won't14.She will go if it ___ tomorrow.A. isn't rainB. don't rainC. doesn't rainD. didn't rain15.These little boys___ playing football.A. are likingB. likeC. likesD. were liking16.-___ he ___ to work on foot? -Yes, he___.A. Do; go; doB. Does; go; doesC. Is; going; doesD. Does; go; is17.-_____ they often ___ these old men?-Yes, they___.A. Do; help; areB.Are; helping; areC. Do; help; doD. Are; helped; are(四)变否定句。
1. He wants a book.______________________________________________________________2. Jimmy washes hands before dinner.______________________________________________________________3. Lisa likes milk very much.______________________________________________________________4. They walk to school.______________________________________________________________5. Lingling and Dandan are 10 years old.______________________________________________________________ (五)变一般疑问句并作肯定和否定回答。