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知识点：一.happen用法(无被动语态）sthhappen+某时.某地发生什么事sthhappentosb某人发生什么事sbhappentodosth某人碰巧做某事1.Anaccident___yesterday.2.Ihappened___(meet)myoldfriendlastSunday.3.Whathappened___you?(介词）4.昨天琳琳发生了一个意外。三maybe“或许”或“可能”（副词，常用于句首）maybe/do动词（用于主语之后）四.unhappy,unfair,uncomfortable,unlucky等词在句中时，反意疑问句用否定形式。1.Heisunhappy,_isn’the_____?2.Tanawassounlucky,______?3.Sarafeltveryuncomfortable，____?五becarefulofsb/sth当心，小心---becareful(not)todo当心做某事.1.Becareful____thieveswhenonthebus.2.Becareful___(play)ontheroad.3.当心别迟到了。情态动词can/couldmustmay/mightneed--Whosevolleyballisthis?--Itmustbelongto__.A.JackB.Jack’s练习1.Ihappened___(meet)TomlastFriday.2.Whathappened___you?(介词）3.Thereisaboy___(play)ontheroad.4.There’resomebooks_____.(read)4.Maybesheis15.=She__________15.5.Becareful___(play)ontheroad.6.---ＭayIgoshoppingnow?---No,you______.Youmustfinishyourhomeworkfirst.A.mustn’tB.maynotC.needn’t
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