知识点：《supposed》收集：平费的编辑：梅花姐姐
本知识点包括：1、be supposed to 是什么意思？ 请举例。 2、supposed是什么意思 3、be supposed to是什么意思 4、用be supposed to造句最少3个 5、be expected to do 和 be supposed to do 有什么区别 。
《supposed》相关知识
be supposed to 的用法
用法一：be supposed to...其中to是动词不定式符号,不是介词,其后要跟动词原形.当be supposed
to...的主语是“人” 时,意为“应该……
”；“被期望……”,它可以用来表示劝告、建议、义务、责任等,相当于情态动词should.如：
Everyone is supposed to wear a seat-belt in the car.
每个人在汽车里都应该系安全带.
Teachers are supposed to treat all the students alike.
老师应该对所有的学生一视同仁.
用法：当be supposed to...的主语是“物”时,它表示“本应；本该”,用于表示“某事本应该发生而没有发生”.如：
The new laws are supposed to prevent crime.这些新法令本应该起到防止犯罪的作用.
The train was supposed to arrive half an hour ago.火车本应在半小时之前到达.
用法三：be supposed to后面接“have + 过去分词”时,表示“本应该做某事而没做”.如：
You are supposed to have handed in your homework by now.
现在你应该已经把作业交上来了.
He is supposed to have arrived an hour ago.他应该一小时前就到了.
用法四：be supposed to...的否定结构为be not supposed
to...,它常用于口语中,意为“不被许可；不应当”.如：
She was not supposed to be angry about that.她本不该为那件事而生气的.
You are not supposed to smoke on the bus.你不应该在公共汽车上吸烟.
知识拓展：
1：besupposedto和should用法上有什么区别?Youshouldstudyhard,foryouareastudent，难道这不是客观上的义务和责任？Youaresupposedtolitentoyourboss这也是主观认为啊Heissupposedtoworkhard.这是说他“有责
知识要点归纳：
be supposed to 表示“理应.”强调客观上,“猜想会.”常用于被动语态中
You are supposed to liten to your boss.
He is supposed to work hard.
should 表应该.,强调主观上的原因
You should work hard to catch up with your classmates.
You shouldn't laugh at her.
1、be supposed to还有“据说”（=be said to)
Let's go and see that film.It's supposed to be very good.
2、计划、安排 The train was supposed to arrive at 11:30,but it was 40 minutes late.
3、be not supposed to 表示不允许等
You're not supposed to park here.
2：besupposedto的用法举例说明
知识要点归纳：
suppose如何用
suppose的基本意思是“猜想；以为；假定”,但在具体的语言环境中意义不止于此,其用法如下：
1.suppose + that 从句,表示“猜测；假定”.如：
I suppose that you are right.我想你是对的.
You can suppose that A equals B.你可以假定A等于B.
2.suppose +名词 / 代词 + to be...,表示“认为……是……”.如：
Many people suppose him to be over 50.许多人认为他已经50多岁了.
3.suppose用于祈使句中,表示“让……”.如：
Suppose we go for a swim.(= Let's go for a swim.) 让我们去游泳吧.
be supposed to 的用法
用法一：be supposed to...其中to是动词不定式符号,不是介词,其后要跟动词原形.当be supposed
to...的主语是“人” 时,意为“应该……
”；“被期望……”,它可以用来表示劝告、建议、义务、责任等,相当于情态动词should.如：
Everyone is supposed to wear a seat-belt in the car.
每个人在汽车里都应该系安全带.
Teachers are supposed to treat all the students alike.
老师应该对所有的学生一视同仁.
用法：当be supposed to...的主语是“物”时,它表示“本应；本该”,用于表示“某事本应该发生而没有发生”.如：
The new laws are supposed to prevent crime.这些新法令本应该起到防止犯罪的作用.
The train was supposed to arrive half an hour ago.火车本应在半小时之前到达.
用法三：be supposed to后面接“have + 过去分词”时,表示“本应该做某事而没做”.如：
You are supposed to have handed in your homework by now.
现在你应该已经把作业交上来了.
He is supposed to have arrived an hour ago.他应该一小时前就到了.
用法四：be supposed to...的否定结构为be not supposed
to...,它常用于口语中,意为“不被许可；不应当”.如：
She was not supposed to be angry about that.她本不该为那件事而生气的.
You are not supposed to smoke on the bus.你不应该在公共汽车上吸烟.
3：【例句如下:Iamsupposedtobeslimming.这里的besupposedto他为什么用了beslimming?.】
知识要点归纳：
其实be supposed to你就把它当should 来用吧,我应当要减肥.其实我觉得这里直接用形容词slim更好.i'm supposed to be slim.我本应当是瘦的,大家都认为我应该是苗条的才对.
4：【oughtto和besupposedto的区别和用法】
知识要点归纳：
ought to：表达的意思是应该,应当,大概会做某事
be supposed to：表达的意思应该是被猜想做某事被认为的
5：besupposedto的用法问题RTwassupposedto和weresupposedto的情况但感觉它和should差不多,should一般不出现过去式.所以besupposedto一般只用is/aresupposedto
知识要点归纳：
不对,be supposed to是一个词组,be动词有时态之分的
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