初三英语上册第三单元知识点总结.doc

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1、__________________________________________________Unit3一、知识点①英语有两种语态：主动语态和补动语态　　　主动语态表示是动作的执行者；被动语态表示主语是动作的承受者　　Cats　eat　fish.　（主动语态）猫吃鱼。　Fishiseatenbycats.　(被动语态)鱼被猫吃。②被动语态的构成：由“be＋及物动词的过去分词”构成时态被动语态结构例句一般现在时amare+过去分词isEnglishisspokeninmanycountries

2、.一般过去时was+过去分词were+过去分词Thisbridgewasbuiltin1989.情态动词can/shouldmay+be+过去分词must/……Theworkmustbedonerightnow.2.allowsb.todosth.允许某人做某事（主动语态）allowdoingsth允许做某事…　eg:MotherallowsmetowatchTVeverynight.妈妈允许我每晚看电视。　beallowedtodosth.被允许做某事（被动语态）如：　eg:　LiLyisall

3、owedtogotoQinzhou.莉莉被允许去钦州。3.gettheirearspierced穿耳洞get/have+sth.+done(过去分词)　让/使（别人）做某事　　　eg:Igetmycarrepaired.==Ihavemycarrepaired.我让别人修好我的车4.形容词＋enough如：beautifulenough　足够漂亮enough＋名词　如：enoughfood足够食物enoughto　足够…去做…　如：Sheisoldenoughtogotoschool.她够大去读书

4、了。5.stopdoingsth.停止做某事　Pleasestopspeaking.请停止说话。stoptodosth.停止下来去做某事　Pleasestoptospeak.请停下来说话。6.倒装句:由so/neither＋助动词＋主语　“也/也不一样”（用于不同主语）so+主语+助动词“的确如此”（用于同一主语）　　eg:Sheisastudent.SoamI.　她是一个学生，我也是。Shewenttoschooljustnow.SodidI.她刚才去学校了，我也是Tomcan’tswim.Ne

5、ithercanJohn.Heisacleverboy,soheis.他的确如此7.goshopping(去购物),gofishing(去钓鱼)收集于网络，如有侵权请联系管理员删除__________________________________________________goswimming(去游泳),goboating(去划船)gohiking(去登山),gotrekking(去徒步)8.bestrictwith+人.“对某人要求严格”bestrictin+事物.“对某事要求严格”例:T

6、heheadteacherisstrictwithhisstudentsHeisstrictinthework.9.agree同意　反义词disagree不同意动词agreement同意　反义词disagreement不同意　名词10.keepsb/sth.＋形容词　使某人/某物保持….　keepsbdoing让某人一直做某事如：Weshouldkeepourcityclean.我们应该保持我们的城市干净。Don’tkeepmewaitingforalongtime.别让我等得太久。11.both

7、…and…　“既。。。又。。。”“都。。。”动词用复数形式如：BothJimandLiMingplaybastketball.NeitherJimnorLiMingplaysbasketball.（就近原则）12.learn(sth.)fromsb.向谁学习(什么)如：JimlearntEnglishfromhisEnglishteacher.吉姆向他的英语老师学习英语13.haveanopportunitytodosth.有机会做某事haveachanceofdoingsth.有机会做某事如：I

8、haveanopportunitytogotoBeijing.IhaveachanceofgoingtoBeijing.14.花费take,cost,spend,payIttake(sb.)timetodosth.Ittook(me)10daystoreadthebook.sth.cost(sb.)……Thebookcost(me)100yuan.sb.spend…onsth.Shespent10daysonthisbook.sb.spend…doingsth.Shespent10