suppose与think的含义相同,“认为,以为”besupposed表示“被期望或要求应该”,在口语中,意为“不容许,不应当”.besupposed+toinfinitives动词不定式eg.Youaresupposedtoarriveontime.besupposedto的用法besupposedtodosth相当于shoulddosth或者是beexpectedtodosth.人称,时态和句式体现在be的变化上，to为不定式符号后接动词原形。句式：1)肯定句：besupposedtodosth2)否定句：benotsupposedtodosth相当于shouldn’tdosth.或benotallowedtodosth.意为“不应当做某事；不被允许做某事”。Youarenotsupposedtoplayfootballintheclassroom.3)疑问句：besupposedtodosth的疑问句是将be动词的相应形式提到主语前面。Areyousupposedtosleepatnine?晚上你应该在9点睡觉吗啊？Whatareyousupposedtodoonweekend?在周末你应该干什么？用法示例当besupposedto的主语是人时，意为“应该…”表示劝告、义务、责任等Youare(not)supposedtobowwhenyoumeetsomeoneforthefirsttime.你第一次见到某人时（不）应该鞠躬。当besupposedto的主语是物时，表示“本应；本该”。表示“某事应该发生却没有发生”Thetrainwassupposedtoarrivehalfanhourago.火车本应在半小时之前到达。“besupposedto+have+及物动词过去分词”表示“本应该做而没做”是虚拟语气的一种表达方式，含有责备、失望之意。Heissupposedtohavearrivedanhourago.他本该一小时前就到。Itbe+adj.+todosth.Itbeimportanttodosth.…做某事很重要e.g.ItisimportanttolearnEnglishwell.学好英语很重要。Findtheanswertothequestion.1.You’resupposedtoshakehands.2.You’renotsupposedtokiss.3.Iwassupposedtoarriveat7:00.4.No,you’reexpectedtowearasuitandtie.5.Yes,it’sveryimpolitetokeepotherswaiting.6.Yes,it’simportanttobeontime.Isitimportanttobeontime?6Isitimpolitetokeepotherswaiting?5Whatareyousupposedtodowhenyoumeetsomeoneforthefirsttime?1AmIsupposedtowearjeans?4Whenwereyousupposedtoarrive?3根据课本内容完成句子。1.你第一次遇到某一个人应当做什么？___________you____________whenyoumeetsomeoneforthefirsttime?2.你应该握手。You_________________________.3.你不应该亲吻。You__________________kiss.Whataresupposedtodoaresupposedtoshakehandsarenotsupposedto4.--你应该什么时候到？--我应该7点钟到。--Whenwereyou________________?--I___________________at7:00....
