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课标人教实验版高一Module3Unit2GrammarGrammar1.oughtto／shouldshould和oughtto都为“应该”的意思，可用于各种人称。oughtto的语气稍重一些。Yououghtto(should)followyourteacher’sadvice.表示主语的义务或责任：Youshouldtakecareofyoursister．你应当去照顾你妹妹。或指出—个正确、明智的动作：Theyshouldn'tallowparkinghere；thestreetistoonarrow．这儿不该允许停车；马路太窄了。should和oughtto后面跟动词不定式的完成式,其肯定句表示”过去应该做而未做”,其否定句则表示”过去不该做但做了”。Youshould/oughttohavemadethedecisionaweekago.Ishouldn'thavemadesuchafoolishmistake.多数情况下，oughtto可与should互换使用。oughtto的反意疑问句用shouldn’t替代。注意YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyou2.must和havetomust的用法1）表示主观的义务和必要,主要用于肯定句和疑问句,意思为“必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或haveto,否定回答要用needn’t或don’thaveto,意思是“不必”；must的否定形式mustn’t表示禁止，意思是“不能，不许”。如：—MustIfinishthetaskrightnow?我现在必须完成这个工作吗？—Yes,youmust./Yes,youhaveto.是的。(—No,youneedn’t./No,youdon’thaveto.不，不必。)Youmustn’tcomeherewithoutpermission.未经允许，你不能来这儿。haveto的用法1）must表示一种主观的需要，而haveto表示一种客观的需要，意思是“不得不”。如：Ihavetoattendanimportantmeetingthisafternoon.今天下午我不得不参加一个重要的会议。Motherisout,soIhavetolookaftertheshop.妈妈不在家，因此我不得不照看商店。2）haveto的否定形式是don’thaveto,相当于needn’t。如：Theydon’thavetobuyacomputeratpresent.他们目前没有必要买电脑。【考例】Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.(上海2007春)A.can’tB.mustn’tC.needn’tD.shouldn’t【点拨】考查情态动词。根据题意,可知这里表示“没有必要”,故只能选C项。【考例】─Whatdoyouthinkwecandoforouragedparents?─You____doanythingexcepttobewiththemandbeyourself.(重庆2007)A.don’thavetoB.oughtn’ttoC.mustn’tD.can’t【点拨】根据题意“除了和他们呆在一起做你自己外,没有必要做任何事情。”可知这里选择don’thaveto表示“不必”。故选A项。用下列图片造句。做适当的运动Youshoulddosomesports.慢慢地进食，并有助消化。Yououghttoeatslowlyandit’sgoodfordigestion.Youshouldhelptosetthedinnertable.Youshouldkeepyourroomclean.Wemustlistentotheteachercarefully.Wemustn’teatinclass.Yououghttohandonthehomeworkontime.Youshouldn’tbelateforschool.Weshouldaskquestionactively.Weshouldn’tmakenoiseinclass.Makesentences1.你每天最少要练习一小时口语。YoumustpractisespeakingEnglishatleastanhouraday．2.我每天不得不练习一小时口语！IhavetopractisespeakingEnglishanhouraday！3.你应该每天练习不止一小时。Yououghtto／shouldpracticeEnglishformorethananhour．4.你应该读一下这个。它写得很好。Yououghtto／shouldreadthis．It’sverygood．5.你必须读这个。写得精彩极了！Youmustreadthis．It'smarvelous！Pleasechooseaproperphraseandaccordingtothesituationscompletethesentencesbyusingshould(not)orought(not)to.1.Lisaneedsachange.She_______________________________.2.Mysalaryisverylow.You______________________.should/oughttotakeafewdaysoffshouldlookforanewjob3.Nickalwayshasdifficultygettingup.He___________________________________.4.Whatabeautifulview!You__________________.5.Billy’sroomisn’tveryinteresting.He______________________________________.oughtnotto/shouldn’tgotobedsolateshouldtakeaphotoshouldn’t/oughtnottousehercarsomuch1.Foralongtime,I’vebuiltmybusinesswithpeopl...