新概念3精品课件lesson 22 By heart.ppt

Lesson22Byheart I Objectives 1 bl 2 ceed3 虚拟语气 Subjunctivemood虚拟语气 虚拟语气用来表示说话人的主观愿望或假想 所说的是一个条件 不一定是事实 或与事实相反 1 在条件句中的应用条件句 真实条件 不用虚拟 if是如果的意思 句型 条件从句主句一般现在时shall will 动词原形e g Ifhecomes hewillbringhiscat Ifyouleavenow youarenevergoingtoregretit Ifyouleavenow youwillneverregretit 在真实条件句中 主句不能用begoingto表示将来 该用shall will Ifitisnight thesundoesn trise 表示真理时 主句谓语动词便不用shall will 动词原形 而直接用一般现在时的动词形式 非真实条件 用虚拟时态 可以表示过去 现在和将来的情况 基本特点 时态退后 Ifyouhadworkedhard youwouldn thavefailedintheexam IfIwereabird Icouldflyintheair Ifitweretoraintomorrow themeetingwouldbeputoff 省略if要主谓倒装 IfIwereaboy Iwouldjointhearmy WereIaboy Iwouldjointhearmy Ifhehadtakenmyadvice hewouldhavesucceeded Hadhetakenmyadvice hewouldhavesucceeded 1 todothework Ishoulddoitsomeotherday A IfwereIB IwereC WereID WasI2 Thevolleyballmatchwillbeputoffifit A willrainB rainsC rainedD israined 3 Ifitrained they stay athome wouldstay4 Wewouldbeverymuchpleasedifyou come came5 Whatapity Ihaven tgotmycar IfIhad I take youtotheairport havetaken 6 Wewouldanswerthequestionsifwe can could7 IfIwereyou I take alongwalkbeforegoingtobed wouldtake 8 Ifit lastnight itwouldbeverycoldtoday A hadrained B rainedC shouldrainD weretorain 混合条件句主句与从句的动作发生在不同的时间 这时主 从句谓语动词的虚拟语气形式因时间不同而不同 这叫做混合条件句 Ifyouhadaskedhimyesterday youwouldknowwhattodonow 从句与过去事实相反 主句与现在事实相反 2 在宾语从句中应用在表示命令 建议 要求等一类动词后面的从句中 order suggest propose require demand request insist command insist should doe g Isuggestthatwe should holdameetingnextweek e g Heinsistedthathe should besentthere 如suggest insist表 暗示 表明 坚持认为 时 宾语从句用陈述语气 判断对错 Youpalefacesuggeststhatyou should beill Yourpalefacesuggeststhatyouareill 3 在同位语从句和表语从句中应用在suggestion proposal idea plan order advice等名词后面的表语从句 同位语从句中要用虚拟语气 即 should 动词原形 Myideaisthatwe should getmorepeopletoattendtheconference Imakeaproposalthatwe should holdameetingnextweek 4 在主语从句中应用itis adj 当形容词是advisable critical crucial desirable essential imperative important incredible 等 主语从句多用虚拟语气 现在时 v用should would 动词原形 should would经常省略 过去时 则用should would havedone的形式 Itisnecessary important natural strange etc thatweshouldcleantheroomeveryday Itwascrucialthatweshouldhavedonethehomework 5 在其他场合运用 ifonlyifonly 如果 就好了 ifonly表示与现在事实相反和与过去事实相反现在事实相反 用过去时态与过去事实相反 用过去完成时e g Ifonlyyoulistenedtome Ifonlyyouhadlistenedtome wishIwishIwereastallasyou 我希望和你一样高 Hewishedhehadn tsaidthat 他希望他没讲那样的话 Iwishitwouldraintomorrow 我希望明天下雨就好了 Itis high timethatItis high timethat过去式 shoulddo s