新概念青少版3B Unit24 Lesson 48课件

连词成句 inCraigtodayandIweretroublewewereonthesystemWhiletostartedenteringdataCraiglaugh theLibrariancameinwerestillbothwelaughingwhenonthedrawinghelostwhilewasworkinghiskeythekey 延续性动词 短暂性动词 延续性动词 动词表示的行为可以延续一定的时间 sleep stay wait live 短暂性动词 动词所表示的行为不能延续 在很短的时间内完成 die come leave gotosleep getmarried bedead 延续性动词与短暂性动词之间的转换 leave beawayborrow keepbuy havedie bedead finish beoverjoin beinopensth keepsthopengo get out beout catchacold haveacoldcomehere beheregothere betherebecome be comeback bebackfallasleep beasleepleave beawayputon wear 短暂性动词的完成式不能和表示一段时间的状语连用 Hisgrandfatherhasdiedfortenyears Hisgrandfatherdiedtenyearsago Hisgrandfatherhasbeendeadfortenyears 1 Howlonghaveyougetmarried Howlonghaveyoubeenmarried 2 Mr Smithhasleftfortwoweeks Mr Smithhasbeenawayfortwoweeks 时间状语从句 when和while while引导的时间状语从句多用进行时态 when引导的时间状语从句多用一般时态 eg Whiletheyweretalking thebellrang eg Iwasdoingmyhomeworkwhenmymothercamebackhomeyesterdayevening 另外 when 和 while 的区别还在于 while 引导的时间状语从句多用进行时态 而 when 引导的时间状语从句多用一般时态 例如 1 Whiletheyweretalking thebellrang 正在他们谈话的时候 上课铃响了 2 Iwasdoingmyhomeworkwhenmymothercamebackhomeyesterdayevening 昨天晚上妈妈回家的时候 我正在做家庭作 另外 when 和 while 的区别还在于 while 引导的时间状语从句多用进行时态 而 when 引导的时间状语从句多用一般时态 例如 1 Whiletheyweretalking thebellrang 正在他们谈话的时候 上课铃响了 2 Iwasdoingmyhomeworkwhenmymothercamebackhomeyesterdayevening 昨天晚上妈妈回家的时候 我正在做家庭作 WhileIwaswatchingTV mysisterwasintheshower Whenthetelephonerang mybrotherwasdoinghishomework while when用法辨析 1 Whilehewasreading hefellasleep 2 Whenhecamein Iwashavinglunch WhenIwassleeping athiefbrokein 用when或者while填空1 Hewasdrivingalong suddenlyawomanappeared 2 Jakewaswaitingatthedoor anoldwomancalledtohim 3 Hewasreadingabook suddenlythetelephonerang 4 itbegantorain theywereplaying