牛津译林版 八年级下 Unit4 A good read复习課件（48张PPT）（含音频+视频）.ppt

1.“Imustrunawayfromthem,”Gulliverthought.2.Ihavetousethemtoreachtheboxonthefridge.3.Youmustnotsmokeinthelibrary.4.Wedonothavetogotoschoolatweekends.=donotneedtomust表示“有义务”，“必须”做某事，强调说话人的主观看法，主要用于肯定句和疑问句，“必须，得，要”。e.g.你今天必须完成家庭作业。Youmustfinishyourhomeworktoday.must的否定形式mustn’t,表示禁止:“不准”。e.g.课堂上你们不许发出噪音。Youmustn’t?make?any?noise?in?class.haveto表示一种客观的需要，“不得不”。有人称和数的变化。e.g.天快黑了，他现在得回家了。Itisgettingdark.Hehastogohomenow.haveto的否定形式donothaveto,相当于neednot/donotneedto.e.g.他们目前没有必要买电脑。Theydonothavetobuyacomputeratthemoment.我必须努力学习功课。(主观意愿）I?must?work?hard?at?my?lessons.??????我得在家照看妈妈，因为她病了。(客观需要）I?have?to?look?after?mother?at?home.?Because?she?is?ill.?我们不必等他。他已经离开了。Wedon’thavetowaitforhim.Hehasleft.这里禁止游泳。Youmustn’tswimhere.Moreexamples1.--Mustwefinishalltheexercisestoday?--Yes,you_______./No,you________.2.You__________throwrubbishontheground.3.It’sgoingtorain.You______________waterflowers.4.Simon’snameisonthecoverofthebook.It_______behis.It_______beyours.mustneedn’tmustn’tdon’thavetomustcan’t注意:must还可以表示肯定猜测，意思是“一定”。否定的猜测是can’t.e.g.走了那么远的路，你一定饿了吧。Youmustbehungryafterwalkingsuchalongway.eg.那肯定不是Lucy，她已经去了美国。Thatcan’tbeLucy.ShehasgonetotheUSA.Libraryrules(准则)You(1)keepquietinthelibrary.You(2)keepthebookscleanandtidy.You(3)draworwriteinthebooks.You(4)eatofdrinkinthelibrary.You(5)returnthebooksontime.Ifyouwanttokeepthemlonger,you(6)renewthem.You(7)bringyourstudentcardeverytimeyougotothelibrary,butremembertobringyourlibrarycard.mus