suppose, be supposed to用法最全总结
suppose的用法 (2)
suppose的用法suppose是一个常见的动词，用于表示假设、设想和推测。
在英语中，suppose可以用于不同的情况和句型，具体用法如下：1. 表示假设suppose可以用于表达假设，即假定某种情形成立。
例如：•I suppose she will be here soon.（我想她很快就会来。
）•Let’s suppose, just for a minute, that we had all the money we wanted.（让我们假设，只是为了一分钟，我们有我们想要的所有钱。
）2. 表示推测suppose可以用于表示根据已有的信息或事实作出合理的推测。
例如：•They are running late. I suppose there must be traffic on the road.（他们迟到了。
我猜路上肯定有交通堵塞。
）•It’s been raining all day. I suppose the picnic will have to be canceled.（整天都在下雨。
我想野餐将不得不取消。
）3. 表示责备或怀疑suppose还可以用于表示对某人的责备、怀疑或猜测。
例如：•I suppose you forgot to lock the door.（我猜你忘记锁门了。
）•He is supposed to be the best in his field, but I don’t see anything special about him.（他应该是他领域中最好的，但我没有看出他有什么特别之处。
）4. 与句型搭配suppose还可以与一些特定的句型搭配使用，表达不同的含义。
以下是其中一些常见的句型：•suppose that + 句子：用于引导一个假设情况。
例如：Suppose that you won the lottery, what would youdo?•suppose (that) + 主语 + 动词：用于表达责备或怀疑。
关于英语be supposed to 的用法
be supposed to 的用法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。
. 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。
用法二：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。
be supposed to用法聚焦
们不得不把它推迟了。
揖拓展铱
The train was supposed to arrive at
be supposed to have done sth. 表示
9:30, but it was 20 minutes late. 火车本应 “本应该做某事但没做”。例如：
在九点半到达，但它晚了 20 分钟。
guests, Mark.
A. shake
B. shaking
C. to shake
D. shaken
2. Your grandmother misses you very much.
苑 语法沙龙
be supposed to
髵
姻用法扫描
三尧be supposed to 的否定形式
be supposed to 是一个固定搭配，意 为“应该；理应；被期望”，其中的 be 有人 称、数和时态等变化，to 是动词不定式符号， 后面接动词原形。关于 be supposed to 的 常见用法，我们做如下归纳：
Though your mother mistakes you sometimes, you are not supposed to talk back to her. 即使有时候你的妈妈误会了 你，你也不应该顶撞她。
四尧be supposed to 的疑问形式 be supposed to 的 疑 问 形 式 是 将 be 动词提到主语之前。例如： Is she supposed to arrive at the air原 port at three in the afternoon? 她应该在下 午三点到达机场吗？ What are you supposed to do in class? 在课堂上你应该做什么？ 五尧be supposed to 的其他含义 be supposed to 还可以表示“一般认 为；据说”等含义。例如： Her brother is supposed to be very clever. 人们认为她的哥哥非常聪明。
Suppose用法
一、Suppose做及物动词，意为“想，认为，猜想，料想”，用法如下：1.suppose后接that引导的宾语从句，that可以省略，如：I suppose we’ll go there next week.我猜想我们下周将去那儿。
2.suppose +名词/代词+[ (to be）+表语]宾语补足语，如：What makes you suppose him to be connected with them?你怎么会认为他与他们有联系呢？3.suppose+名词/代词+不定式，如：I supposed her to have already left for home.我认为她已经动身回家了。
4. suppose+名词/代词+名词（宾语补足语），如：I never supposed him a hero.我从来没有认为他是一个英雄。
5.suppose+名词/代词+形容词（宾语补足语），如：We all suppose him clever.我们所有的人都认为他很聪明。
6. suppose+名词/代词+介词短语，如：I supposed him in the office.我想他在办公室。
7. suppose做插入语，如：You don’t mind my smoking, I suppose.我想你不会介意我抽烟。
使用suppose时应注意：1. I suppose可以用来有礼貌地要求一个肯定的答复，如：I suppose (that) you are very busy just at the moment?我想你这会儿正忙吧？2. suppose, guess与imagine的区别：suppose多用于口语，是试探性的，但有一定的根据；guess随意性很强，缺乏依据；imagine指“设想”、“想象”与众所周知的事实相反的东西，强调虚构和幻想。
如：I suppose they will leave here tomorrow.我猜他们明天要离开这儿了。
Unit10suppose和Itis形容词语法知识清单人教版英语九年级全册
九年级英语UNIT 10语法知识suppose 和 be supposed to 的用法一、Suppose 用法1.suppose+that从句，表示“猜测;假定”。
2.suppose+名词/代词+to be...表示“认为.....是.....”，其中to be可以省略。
3.suppose用于祈使句中表示建议，意为“让......”。
如: Suppose l go there with you.让我和你一起去那儿吧。
二、be supposed to do1.当be supposed to...的主语是人时，意为“应该.....;被期望......”它可用来表示劝告、建议、义务、责任等。
2.当be supposed to...的主语是物时，意为“本应;本该”，用于表示“某事本应该发生而没有发生”。
如:The train was supposed to arrive half an hour3.be supposed to后面接“have+过去分词”时，表示“本应该做过某事而没做”.4.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”.语法练习一、根据句意,用括号中所给单词的正确形式填空。
1. I think parents are _____( suppose) to be strict with their children.2. In China, you are supposed _____ (shake) hands when you meet someone for the first time.3. You _____( be not) supposed to park your car here, sir. Is it going to snow this afternoon?Yes,I _____( suppose) so._____ ( suppose ) that I am 25 years old.二、按要求完成下列句子,每空一词。
suppose的用法
一、关于否定转移表示“想”、“认为”、“料想”等，后接否定的宾语从句时通常将否定转移到主句上。
如：I don’t suppose he is really ill. 我看他不是真病了。
I don’t suppose that he will come in time. 我看他不会及时来的。
注意以下简略答语的使用：A：Will he win? 他会赢吗?B:I suppose so. 我想他会赢吧。
B:I don’t suppose so. [I suppose not. ] 我想他不会赢。
二、关于词序2. 注意以下正误句型的词序:你认为他会去了哪里呢?正：Where do you suppose he has gone?误：Do you suppose where he has gone?你认为是谁偷了这钱呢?正：Who do you suppose has stolen the money?误：Do you suppose who has stolen the money?三、用于be supposed to用于be supposed to, 意为“应该”、“理应”，其后接动词原形(有时为进行式或完成式)。
如：You are supposed to be there before dark. 你应该在天黑前赶到那儿。
He’s supposed to be doing his homework at home now. 他现在应该在家里做作业。
He is supposed to have written us a letter. 他本来应该给我们写封信的。
注：用于否定句，有时表示委婉地禁止，意为“不应当”、“不可”、“不许”。
如：You’re not supposed to smoke in here. 此地不准吸烟另外请比较：他们本来应该在一小时以前赶到这儿的。
正：They were supposed to be here an hour ago.正：They are supposed to have been here an hour ago.四、用作连词用来表示条件(相当于连词if)，意为“假设”，也可用-ing 的形式，若语气不肯定，有时还可用虚拟语气。
高三英语suppose的用法知识点
高三英语suppose的用法知识点英语suppose的用法▲句型：①suppose(that)...认为/猜想，②supposesb/sthtobe+n./adj./num./prep.phrase认为某人/某物，③(Letus)Suppose(=Supposing)(that)clause假设，;假定，;倘若，④Isupposeso./Isupposenot.我认为会的/我认为不会的。
⑤besupposedtodosth被认为是，;理应干某事。
应该十某事(一shoulddosth)⑥benotsupposedtodosth=benotallowedtodosth“不允许干某事”，表示委婉的禁止。
⑦is/aresupposedtohavedonesth=was/weresup- posedtodosth=shouldhavedonesth或oughttohavedonesth本该干了某事(而事实上并未千)⑧Wh-doyousuppose(=think)+陈述句语序?⑨Idon’t supposethat...(否定转移)考例12(1997上海)--Ihaven’theardfromHenryforalongtime.--Whatdoyousuppose____tohim?A.washappeningB.tohappenC.hashappenedD.hadhappened[考查目标]考查双重疑问句的句型结构。
[答案与解析]C“Wh-doyousuppose(=think)+陈述句语序?”由此可以排除B项。
根据时态在语境中的特点，可以知道强调对现在的影响，而不是当时正在进行的动作。
人教版九年级英语 Unit 10 单元语法小专题
单元语法小专题(Grammar Focus)语法精讲suppose的用法总结suppose作为动词，其意思是“猜想，设想，认为，假设”，其常见用法为:1. be supposed to do sth.意思是“被期望做某事；应该做某事”，to是不定式符号，不是介词，后接动词原形。
be supposed to常用来表示劝告、建议、告知义务或责任等，相当于should。
如:He is supposed to arrive on time.他应该准时到达。
You are supposed to ask the teacher if you want to leave the classroom.如果你要离开教室，你应该问问老师。
You are supposed to shake hands.你应该去握手。
2. 在口语中，常用否定结构“be not supposed to do sth.”，意思是“不允许做某事；不应该做某事”，相当于shouldn't。
如:You are not supposed to smoke on the bus.(＝You shouldn't smoke on the bus.)你不应该在公共汽车上吸烟。
We are not supposed to play football in the street.我们不应该在大街上踢足球。
3. be supposed to have done sth.意为“本应该做某事而没有做”。
如:You are supposed to have handed in your homework.你本应该已经交了作业。
4. supposed＋that从句，当变为否定句时，否定词应该前移。
类似的词还有think，believe 等。
如:I don't suppose he will tell you about it.我认为他不会告诉你这件事。
be supposed to的用法!.doc
be supposed to的用法！
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。
用法二: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:
①The new laws are supposed toprevent crime.
这些新法令本应该起到防止犯罪的作用。
②The train was supposed to arrive half an hour ago.
火车本应在半小时之前到达。
[典例分析]
Youre not .to walk on the grass.We should learn to protect it.
A. supposed
B. suppose
C. supposing
[答案] A
考点:考查固定句式的用法。
suppose的用法和短语
suppose的用法和短语"Suppose" 是一个多功能的词汇，可以用作动词、名词和连接词。
下面是一些 "suppose" 的常见用法和短语：1.动词用法：a. 表示假设或推测：We suppose that it will rain tomorrow.（我们假设明天会下雨。
）b. 表示猜测或推测：I suppose he is busy.（我猜他很忙。
）c. 表示认为或假设：I suppose I'll have to go now.（我猜我现在得走了。
）d. 表示认为可能或有可能发生：It is supposed to be the best restaurant in town.（据说这是镇上最好的餐厅。
）e. 表示允诺或答应：I suppose I could help you with that.（我可以帮你做这个。
）f. 表示假定或设想：Suppose we go for a walk.（假设我们去散步吧。
）2.名词用法：a. 在口语中，常用于“what if” 后面，表示假设或设想：Whatif we miss the train, what will we do then?（如果我们错过了火车，我们该怎么办？）3.连接词用法：a. 用于表示条件或假设：Suppose you win the lottery, what would you do?（假设你中了彩票，你会做什么？）b. 用于表示让步或反驳：Suppose I am wrong, what difference does it make?（假设我错了，又有什么区别呢？）4.相关短语和表达：a. "suppose that"：表示假设或推测的常用短语，相当于"assuming that" 或 "if"：Suppose that I'm right, what would you do?（设想我是对的，你会怎么做？）b. "suppose so"：表示同意或接受其中一种观点或意见：I suppose so, if you say so.（如果你这么说，我就同意。
suppose的用法
பைடு நூலகம்
（4）be supposed to
sb be supposed to do 某人应该做某事。相当于should
sb be supposed to have done 某人本应该做某事。相当于should have done
（1）suppose +that 表推测，假定，假如，认为
例如:I suppose that you are right. 我想你是对的。
It is supposed that he was at home during that time.据推测，他当时是在家的。
Suppose (that) this is the most beautiful flower you can find on the earth, then...
假如这就是你能在地球上找到的最美丽的花朵，那么...（注意:前半句是条件状语从句，then后才是主句）
（2）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。
（3）suppose +名词 +to be 表示“认为……是……”。
sth be supposed to do表示“某事本应该发生”。
Suppose
及物动词 vt.1.料想; 猜想; 以为You are only supposing this on hearsay, you have no proof. 你只是根据传闻想像而已, 并没有证据。
I suppose he will be back by eight o'clock.我想他八点钟以前会回来。
They suppose that all rich men are wicked.他们以为凡是有钱人都很坏。
I hadn't supposed that I should get the first prize.我没有想到会获得一等奖。
What do you suppose that dance is?你认为那是什么舞?All her neighbours supposed her to be an actress.街坊都以为她是一个演员。
They supposed him dead.他们以为他死了。
I should suppose him to be about fifty.我猜想他大约50岁。
They suppose the box to contain books.他们猜想这箱子里装的是书。
I supposed it wrong to tell a lie.我认为说谎不对。
Never suppose yourself knowing everything.别以为你自己是万事通。
He supposed himself doing the best thing.他以为他做得最好。
2.假定, 假设3.（婉转表达）我看，要我说，要不4.[用于祈使句]让Suppose we wait until tomorrow.咱们就等到明天吧。
5.意味着；说明(或证明)…的事实(或情况)The number of the cars supposes that the city traffic would get busier and busier.这些汽车的数量意味着该市的交通会越来越拥挤。
语法 be supposed to do
2）
be not supposed to do
e.g. 你不准在这抽烟。 You are not supposed to smoke here。 你不应该在教室踢足球。 You are not supposed to play football in the classroom。
3）一般疑问句： be supposed to do的疑问句式须将be的 相应形式提到主语前。 e.g.他应该在5点钟到吗? Is he supposed to get there at five? 露西应该像那样说汉语吗? Was Lucy supposed to speak Chinese like that?
4. Students are ____to speak loudly in the reading room. A. told B. supposed C. not supposed D allowed ually people in Japan and Korea____ when they meet for the first time. A. are supposed to kiss B. are supposed to bow C. suppose to kiss D. suppose to how
6. People are ______ to ______ when they meet for the first time. A. suppose; shake hands B. supposed; shake hands C. supposed; shake hand D. suppose; shake hand 7. I don’t supposed anyone can work out the problem，________? A. do I B. don’t I C. can they D. can’t they 8. You _____ supposed to take them out of the room. A. didn’t B. aren’t C. don’t D. can’t
suppose的用法和例句
suppose的用法和例句suppose有假设;假定;认为;想;应该等意思，那么你知道suppose 的用法吗?下面跟着店铺一起来学习一下，希望对大家的学习有所帮助!目录suppose的用法大全：suppose的用法1：suppose的基本意思是指在证据不全、情况未确定时所作的猜想。
可指缺乏确切的事实但可根据一些现象来推测; 也可指提出合乎逻辑推理的假设来论证某事; 还可指委婉地提出建议。
suppose的用法2：suppose是及物动词,可接名词、代词或that/wh-从句(可用于虚拟式)作宾语。
还可接以“(to be+) n./adj. / prep. -phrase”或动词不定式、现在分词充当补足语的复合宾语。
suppose搭用to be构成的复合宾语,如用于被动结构, to be有时可以省去。
suppose的用法3：suppose作“作为建议来考虑”解时,常用于祈使句,用以提出建议,可译为“…如何〔怎么样〕?”。
与“what if”用法相似,动词一般用现在时或过去时。
用过去时时,所提建议听起来不十分肯定。
suppose的用法4：suppose作“准许”解时,常用于被动结构或否定结构,后接动词不定式。
suppose的用法5：suppose在主句中用过去时时,如宾语从句中的谓语动词所表示的动作先于suppose,则该动词须用过去完成时。
suppose的用法6：suppose在表示过去未曾实现的意图、打算或愿望时须用过去完成时。
suppose的用法7：suppose引导否定意义的宾语从句时,须使用转移否定结构。
suppose的用法例句：1. I get a bit uptight these days. Hormones, I suppose.这些天我有点焦躁。
我看是荷尔蒙在作怪。
2. Who do you suppose will replace her on the show?你觉得谁会代替她参加这场演出?3. In a way, I suppose I'm frightened of failing.我想我有点惧怕失败。
Suppose的用法
Suppose的用法suppose是及物动词，常用来表示说话人的看法、猜测或假设。
为了帮助同学们正确使用suppose一词，笔者现将其用法归纳如下：1.be supposed to中的to是动词不定式符号，后接动词原形，主语为人时，表示“应该；被期望”，它可以用来表示劝告、建议、义务、责任等。
主语为物时，它表示“本应；本该”，用于表示某事本应该发生而没有发生。
它还可以用来表示“被认为是；被相信是”。
如：I am supposed to start work at 7:30 every morning.我理应每天早晨7:30开始工作。
The students aren’t supposed to take the books out of the library.学生不应该把这些书拿出图书馆。
The train was supposed to arrive ten minutes ago.火车应该在十分钟之前到达。
They are supposed to be very clever.人们认为他们很聪明。
2. “suppose + that从句”表示“猜测；认为”。
如：I suppose (that) he is right.我想他是对的。
The teacher supposes (that) his students can’t finish this wo rk.老师猜想他的学生不能完成这项工作。
3. “suppose＋名词/代词＋介词短语”表示“猜测某人/某物在……”。
如：He supposed his friend in the library.他猜想他的朋友在图书馆里。
4. “suppose＋名词/代词＋to be”表示“猜想某人……”。
如：She supposed her sister to be in the park.她猜想她妹妹在公园。
I supposed the girl to be a teacher.我猜这个女孩是位老师。
Suppose用法
一、Suppose做及物动词，意为“想，认为，猜想，料想”，用法如下：后接that引导的宾语从句，that可以省略，如：I suppose we’ll go there next week.我猜想我们下周将去那儿。
+名词/代词+[ (to be）+表语]宾语补足语，如：What makes you suppose him to be connected with them你怎么会认为他与他们有联系呢+名词/代词+不定式，如：I supposed her to have already left for home.我认为她已经动身回家了。
4. suppose+名词/代词+名词（宾语补足语），如：I never supposed him a hero.我从来没有认为他是一个英雄。
+名词/代词+形容词（宾语补足语），如：We all suppose him clever.我们所有的人都认为他很聪明。
6. suppose+名词 /代词+介词短语，如：I supposed him in the office.我想他在办公室。
7. suppose做插入语，如：You don’t mind my smoking, I suppose.我想你不会介意我抽烟。
使用suppose时应注意：1. I suppose可以用来有礼貌地要求一个肯定的答复，如：I suppose (that) you are very busy just at the moment我想你这会儿正忙吧2. suppose, guess与imagine的区别：suppose多用于口语，是试探性的，但有一定的根据；guess随意性很强，缺乏依据；imagine指“设想”、“想象”与众所周知的事实相反的东西，强调虚构和幻想。
如：I suppose they will leave here tomorrow.我猜他们明天要离开这儿了。
Can you guess what I mean你能猜出我的意思吗I imagine that you are tired.我猜想你已经累了。
suppose最详细的用法大全
suppose最详细的用法大全suppose 一词的用法很灵活，在高考中常以不同的面目出现。
这里对suppose 的用法进行归纳总结。
1. suppose 意为“认为，猜测”，后常接“宾语+宾语补足语”形式。
① suppose sb./sth. to have done 的结构。
They supposed the paper to have been lost during the war. 他们认为那个文件在战争期间丢失了。
The police arrested him because he was supposed to have killed the lady. 警察逮捕了他，认为他杀死了那位女士。
② suppose sb./sth. (to be) +形容词/ 介词短语的结构。
Everyone supposes him (to be) poor, but he is really quite wealthy. 大家都认为他很穷，实际上很很阔。
She was supposed to be an excellent student in our school. 她被认为是我校优秀的学生。
③ suppose + it +形容词/ 名词+ to do 的结构。
I suppose it my duty to help those in poverty. 我认为帮助那些处于贫困中的人是我的义务。
2. suppose 可用于“ be supposed +不定式”的结构。
① be supposed to do sth. = should do sth. 意为“应该/ 理应做某事”，表示被期望或被要求(按规则、惯例)做某事。
We are supposed to help each other. 我们理应互相帮助。
(要求)You are supposed to hand in your papers before class is over. 希望你下课前交卷子。
suppose,besupposedto用法最全总结(可编辑修改word版)
be supposed to 的用法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。
用法二：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。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
be supposed to 的用法
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。
用法二：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。
suppose的其他用法：
1．suppose ＋ that 引导的宾语从句“假设，猜想，以为”。
例如：
Let's suppose that you had a million dollars， how would you spend it? 假如你有一百万美元，你怎么花呢?
I suppose that she'll be there today．
我想她今天能到那里。
I had supposed he had died years ago．
我原以为他几年前就去世了。
2．当suppose ＋ that 引导的宾从变为否定句时，否定应前移，有此种用法的词有think， believe， guess（猜想）等。
例如：
I suppose that she will come to your party．
→ I don't suppose that she will come to your party．
我猜她不会来参加你的晚会。
I suppose that he will agree with you．
→ I suppose that he will agree with you．
3．在表示同意或不同意别人的观点时，常用“I suppose so/ I don't suppose so”。
－－－ Will he be back this weekend?
他周末会回来吗?
－－－ Yes， I suppose so．
我想他会回来。