UNIT4AmazingScienceTopic1Spaceshipsaremainlycontrolledbycomputers.1Look!Whatabeautifulgoddess!感叹句型一、用what引导的感叹句有三种句式，此时，what为形容词，用作定语，修饰它后面的名词或名词词组。（1）What+a/an+形容词＋可数名词单数＋主语＋谓语！Whatafinedayitis！（多么好的天气啊！）（2）What+形容词＋可数名词复数形式＋主语＋谓语！例如：Whatgoodteacherstheyare！（他们是多么好的老师啊！）（3）What+形容词＋不可数名词＋主语＋谓语！例如：Whatroundbreaditis！（这是一块多么圆的面包啊！）二、用how开头的感叹句也有三种句式，此时，how是副词，用作状语，修饰后面的形容词、副词或动词。（4）.How＋形容词＋主语＋谓语！例如：Howhotitistoday！（今天天气多热啊！）（5）.How＋副词＋主语＋谓语！例如Howhardheworks！（他工作多么努力啊！）（6）.How+主语＋谓语！例如：Howshedances！（她跳舞跳得多好啊！）注意：what和how引起的感叹句，在口语中常可以省略主语、谓语或其它句子成分。例如Howcold（itis）！Whatagoodgirl！Whatdeliciousfish2Itshowswehavedreamedofexploringspaceforthousandsof成千上万years.hundredsof,millionsof,billonsof用法一致3In2003,hetraveledaroundtheearth绕着地球转inShenzhouVfor21hours.4Oh,Kangkang,whatalargecrowd!感叹句5Whynotgoandsee?Whynotdosth.为什么不做某事6Ithinkyoucanachieveyourdreaminthefuture.实现梦想7Thewholeflightlastedaboutfivedays.持续8SoIadviseyoutostudyhardertomakecomputersserveusbetter.servesb.为某人服务9Thereisnodoubt毫无疑问thatcomputersareveryusefulintechnologyandbusiness.10Inspace,computershelpastronauts宇航员andpilots飞行员.11Withthehelpofcomputers在…帮助下,doctorscanfinddiseaseseasilyandsolveotherproblems.12Infactories,robotscontrolledbycomputerscandoworkthatisdangeroustohumans.bedangeroustosb.对某人很危险13SincetheInternetcameintobeing,people'slivesathomehavechanged,too.出现14Thanksto幸亏theInternet,peoplecandoshoppinganddobusinessathome.15Insteadof代替writinglettersonpaper,peoplecommunicatebysendinge-mailsandchattingonline.网上聊天16Ifweplaycomputergamestoomuch,wewon'tstudywellorgetenoughexercise.条件状语从句17First,turnon打开yourcomputerandconnectto连接theInternet.18Verb+object+complement\n动词+宾语+补语\nUnit4Topic2Whenwasitdeveloped?1BecauseI'mnotallowedtoplaycomputergames.benotallowedtodosth.不被允许做某事2It'sbadforyourhealthifyouspendtoomuchtimeonthem.bebadforsth.对某事有坏处3It'smadeofwood.bemadeofsth.由…做成，看的出原材料4Doyouknowwhatarocketisusedfor?beusedfordoingsth.用来做什么的It'susedforsendingsatellitesorspaceshipsintospace.5Iwi