if条件状语从句.ppt

Revision AdverbialClauseofConditionif引导的条件状语从句 复习课 Ifyouarehappy whatwillyoudo IfIamhappy Iwillsmile Ifyoubecomesad whatwillyoudo IfIbecomesad Iwillcry Sheisdoingherhomework Ifyouarehard working youwillgetgoodgrades Shegetsgoodgrades Ifyouplaycomputergamesonweekdays you llbeverytiredinclass yourparentswillbesad youwon tgetgoodgrades youreyeswillbepoor Shewillbelate Ifshe toschool she late Sheisgoingtowalktoschool walks will be Lead in 1 条件状语从句通常由if或unless ifnot 引导 从句中常用一般时代替将来时 即if或unless后的句子谓语用一般现在时 但是 主句则通常用将来时 情态动词或祈使句 时态 主将从现主句一般将来时 从句一般现在时 1 如果主句是一般将来时 从句则用一般现在时 Ifitrains 从句 Iwillstayathome I llgowithyouifyoudon twanttogoalone 从句 2 如果主句含有must may can等情态动词 从句也要用一般现在时 Ifyoudrivetoofast youmayhaveanaccident Youmuststopifthetrafficisred 3 如果主句是祈使句 从句同样要用一般现在时 Don tgoandplayfootballifyoudon tfinishyourhomework PleasecallmeifhecomesnextSunday if条件状语从句结构及时态 Revision If引导条状语从句时 从句中用一般现在时代替一般将来时 1 Ifhe go tothemovies hewon tfinishhiswork goes 2 IfI become adoctor Icanhelpothers become 3 Ifwe have time wewillgototheparktomorrow have 4 如果你去 我也去 Ifyougo Iwillgo 5 如果明天下雨 请带雨衣 raincoat Pleasetakearaincoatifitrains excellent Ifyouarefreethisweekend whatwillyoudo IfIamfree sleepwatchTVplaycomputergames practice Ifyouwanttogetgoodmarks dowhat Don tdowhat Ifyouwanttogetgoodmarks Ifyouwanttogetgoodmarks don t studyhardlistentoteacherscarefully dohomeworkbyyourself copyyourhomework talkintheclasscheatintheexams Ifyouhaveenoughpocketmoney whatwillyoubuy IfIhaveenoughpocketmoney I IfyouinviteforeignerstoChina wherewillyougo Iwillgoto ifIinviteforeignerstoChina MountTai Westlake Hainan If条件句的替代形式 1 祈使句 and or 陈述句 谓语动词通常用将来时态 其中 and表示句意顺承 or表示转折 意为 否则 e g Ifyouworkhard you llpasstheexameasily Workhard andyou llpasstheexameasily Ifyoudon tworkhard you llfallbehindothers Workhard oryou llfallbehindothers verygood 2 用介词with without的替代形式 e g Ifthereisnowater thefishmaydie Fishmaydiewithoutwater Ifyouhelpme I llfinishmytaskontime Withyourhelp I llfinishmytaskontime Activity1Rewritethesentenceswithif Listeninclass oryouwon tunderstandwhattodo Ifyoudon tlisteninclass youwon tunderstandwhattodo 1 Eatbreakfast oryou llgethungryatschool 2 Hurryup We llbelate Ifyoudon teatbreakfast you llgethungryatschool Ifyoudon thurryup we llbelate Activity2 Completethesentences Iwanttogethighscores If workhard dowell youworkhard youwilldowell 1 howcanIremembermyfriends birthdays If keepanoteinyourdiary notforget 2 It slate butIdon twanttogotosleep If notgetenoughsleep feeltiredatschool youkeepanoteinyourdiary youwon tforget youdon tgetenoughsleep you llfeeltiredatschool if引导的条件状语从句和if引导的宾语从句的区分 If在宾语从句中翻译为 是否 If在条件状语从句中翻译为 如果 I llgotoseeyouifIamfreenextweek Iwanttoknowifheisateacher whether 1 if在句中的含义不同 2 if在从句中的位置不同 If引导的宾语从句放在主句之后 而if引导的状语从句可放在主句之前也可放在主句之后 Ifitdoesn train Iwillgoouttomorrow Iwillgoouttomorrowifitdoesn train Idon tknowifthetrainhasarrived If引导的条件状语从句放于句首时多用逗号隔开 而if引导的宾语从句则不能 3 时态要求上有区别 If引导条件状语从句的时态为一般现在时记住 主将从现 1 Iwanttoknowifthereasportsmeetingnextmonth doesn train willbe 2 Ifitdoesn train we llgoout If引导的宾语从句的时态由主句及本身时态决定 找出下列句子中哪些是if条件状语从句 哪些是if宾语从句 1 Canyoutellmeifshecancometothemeeting 2 Shewillnotgothereifitisrainytomorrow 3 Ican tguessifshewillbeangry 4 Ifwehelpeachother wewillgetgoodresults If引导的条件状语从句的练习 1IfI notunderstand Iwillaskmyteacherforhelp IfI copy yourhomework Iwillcheatmyself 3Ifshe notget upearly she llmisstheearlybus 4Ifyourmother buy thebookforyou itwillbegoodforyourstudy don tunderstand copy doesn tget buys 5 Ifyou notwork hard you notpass theexam 6 Ifyourbrother break thewindow hewillfeelverysorryforthat 7 Ifthecomputer notwork menditplease don twork won tpass breaks doesn twork 8 Ifshe notbe interestedinmath shewillfinditveryboring 9 Ifyou get highscores yourparentswillbeproudofyou 10 Ifyou be happy wewillbehappy isn t get are Iwanttoknowifhe come tomorrow ifhe come I give themessagetohim comes willcome willgive summary if的用法 2 引导条件状语从句 译为 如果 假如 1 if从句 祈使句 2 if从句 主句 一般将来时 3 if从句 主句 含有情态动词 1 引导宾语从句 译为 是否 表示不确定的概念 Idon tknowifyourfathercancometogether Canyoutellmeifmissyourparents 1 Ifyou totheparty you llhaveagreattime A willgoB wentC goD going2 I hertheanswerifshe me A cantell willaskB willtell willaskC wouldtell askD willtell asks C D 3 Whatareyougoingtodotomorrow We llgotothelibrarytomorrowifit A isn trainB rainC won trainD doesn train4 Whatwillyoudoifyou totheoldfolk shomevisit A goB wentC goingD willgo A D 5 IfIeat food I llbeveryfat A toomanyB manytooC toomuchD muchtoo6 I llgivethebooktohimifhe herenextSunday A willcomeB comesC iscomingD came 7 There anEnglishfilminourschooltomorrow A isgoingtohaveB willhaveC isgoingtobeD has8 Couldyoutelluswhere A willthenextOlympicGamesheldB thenextOlympicGameswillbeheldC wouldthenextOlympicGamesbeheldD thenextOlympicGameswouldbeheld C C B B If引导的非真实性条件状语从句 虚拟语气 A 与现实事实相反主 过去将来时从 过去时Iftheywerehere theywouldhelpyou B 与过去事实相反主 should would have v p p 从 had v p p E Ifhehadworkedharder hewouldhavesucceeded BYTHETIME bythetime 一般过去时 从句过去完成时bythetime 一般现在时 从句现在完成时 nerdn 令人厌烦的人 愚蠢的人 落伍的人 电脑迷 shrugv 耸肩 表示不知道或不在乎 shrugsthoff aside不把 当回事 对 满不在乎 对 不予理睬dirtn 泥土 污垢 污泥 下流想法 恶意中伤的话Hisclotheswerecoveredindirt 他的衣服沾满了污垢 handn 手 协助 帮助 工具等的 把 柄 掌管vt 传递 交给 搀扶 支持Severalofhiscollea