如何写主题句

如何写主题句写作专题2Negative/unhealthyHabitsofCollegeStudents很多大学生有不健康的生活习惯这种不健康的生活习惯的危害。如何纠正判断下面哪个句子是主题句Nowadayswiththedevelopmentoftechnologyandeconomy,Chinesebecomemoreandmorewealthy,andthatleadtosomeunhealthyhabitsofcollegestudents.AsfarasIamconcerned,ifyougotobedtoolate,thesecondmorning,youwillnotgetoutofbedasusual.Nowadaysmanycollegestudentshaveunhealthylifehabits.Everyonewanttobeahealthystudent,sowewillcorrecttheseunhealthyhabits.主题句用来概括段落的内容，表明作者的观点，或指出作者的写作意图。主题句必须主旨鲜明，言简意赅，而且也必须决定和控制后面的续写内容.主题句通常由两部分组成：一部分是主题（topic），另一部分是作者的观点，也就是用来限制段落中其他句子的段落中心思想（controllingidea）。（1）Peopletakepartinsportsforvariousreasons.（2）Gradesareofgreatimportanceformosthighschoolstudents.（3）Eversinceearlythiscentury,electricityhasbecomeanessentialpartofourmodernlife.【练习】根据下列段落内容，选择适当的主题句1、_______________Hiseyeswerebloodshotandteary.Besides,hishandsshookwhenhelitacigarette;andhecoughedsoseriouslyatnightthathecouldn'tevenfallasleep.Asaresult,hiswifepersuadedhimtoseeadoctorassoonaspossible.A.MrSmithdidabadjob.B.MrSmithdidnotlookhealthyatall.C.MrSmithseemedtobeintrouble.2、_______________Halfofthepeoplehehadinvitedcameanhourearly.Theyspoileddrinksonhisfurnitureandplayedcardsonhisbed.Then,someoneaccidentallysetthecurtainsonfire.Aftertheyallfinallyleft,ittookhimthreehourstocleanup.A.Hispartywasamess.B.Hispartywasasuccess.C.Hecouldn'tsleeplastnight主题句对段落的限制作用Nowadays,unhealthyhabitsofcollegestudentshaveincreasinglybecomeacommonconcernofthepublic.很多大学生有不健康的生活习惯，例如：晚睡、过度消费、沉溺游戏…Nowadays,unhealthyhabitsofcollegestudentshaveincreasinglybecomeacommonconcernofthepublic.电视、报纸一直在讨论，为什么会成为一个普遍关注的话题呢？危害很大。主题句对段落的限制作用（1）时间限制，如：Micro-blogsarebecomingmoreandmorepopularinrecentyears.展开这个段落时，应着重讲解微博在最近几年间的发展情况。（2）地点限制EnglishisgraduallybecomingamustinChina.展开这个段落时，应着重讲解英语在中国的重要性是怎么日益上升的。（3）数量限制Amicro-blogisusefulinmanyways.写这个段落时，不能只强调微博某一方面的用途，至少要列举两三种才能不使内容显得贫乏。（4）侧重点和情感色彩的限制Somepeoplesayon-linechattingisboring.有人说网上聊天很无聊。Somepeoplesayon-linechattingisharmfulforusteenagers.有人说上网聊天对我们青少年有害。注意，如果分别以这两个句子作为主题句，写出来的段落肯定是大不一样的主题句1很多大学生有不健康的生活习惯Manystudentsofuniversitieshavesomeunhealthyhabits.Itcanbenoticedthattherearesomeunhealthyhabitsamongyoungpeople,especiallycollegestudents.句式复杂这种不健康的生活习惯的危害。ThesebadhabitsareverybadforcollegestudentsThesebadhabitsareveryharmfulforcollegestudents.Thenegativeeffectsofunhealthylifehabitsareobvious.Apparently,thesebadhabitsmaygeneratenegativeimpacts.用词复杂如何纠正AsfarasIamconcerned,weshouldrevisetheseunhealthyhabits.Correct/getridofTherearevariouswaysinwhichwecancultivatestudents’goodhabits.Inviewoftheseriousnessofthisissue,it’stimeforustotakeeffectivemeasures.思路首段：现象描述（正面）=引出话题+具体描述+总结话题二段：问题分析（危害）=主题句+危害1（当前+未来）+危害2（自身健康）+危害3（他人）三段：建议措施=主题句+建议1（意识）+建议2（发动群众）+展望未来范文Onthepresent-daycampuses,itcanbeseenthattherearemoreunhealthyhabitsamongcollegestudentsthaneverbefore.Typicalexamplesofthesearestayinguplate,excessiveconsumptionandaddictiontoavarietyofgames.Asaresult,howtohelpthemtocultivatepositivehabitshasbecomeamatterofconcern.Apparently,theseunhealthyhabitsbroughtthemsomenegativeeffectsnotonlyphysicallybutmentally.Tobeginwith,somestudentslosethemselvesincomputergamesdayandnight,whichisharmfultotheirhealth.Evensomeofthemcommitcrimesthroughcomputers.Inaddition,duetothetoomuchfreetime,somedonotknowhowtomakemostfulluseoftheirsparetime,theygoshoppingalldaysbutcausingexcessiveconsumption.Frommyperspective,thereareseveralwaystocultivatestudents’goodhabits.Firstly,collegestudentsshouldbeawareoftheimportanceofstudyandmakingfulluseoftimetodosomethinguseful.Secondly,studentsshouldenhancetheawarenessofwhatthehealthylifeis.Onlybydoingso,canwehopetoenjoytheircolorfulandhealthylifeinIvoryTower.(Iamconvincedthatifwesparenoefforttogetridofthesebadhabits,wewillfindpleasureandsomeacademicfulfillmentinourlife.)