内容正文:
Unit 10 You’re supposed to shake hands.(知识讲解)
You’re supposed to shake hands.你应该握手。
【知识详解 】
be supposed to do sth.表示“应该做某事”,相当于should/ought to do sth,也可以用be expected to do sth.来进行替换。
e.g.You’re supposed to make noise while eating noodles.
= You’re expected to make noise while eating noodles. 吃面条的时候你应该吃出声音。
【拓展】
(1)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。
e.g.You’re supposed to ask the teacher if you want to leave the classroom.
如果你要离开教室的话,应该先问问老师。
(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。
e.g.The meeting is supposed to take place on Tuesday, but we have to put it off.
这次会议本应该在星期二举行,但我们不得不把它推迟了。
(3)was/were supposed to do sth. 相当于should have done sth.,表示“(过去)本应该做某事而实际上并没有做”。
e.g.You were supposed to arrive here at 6:00 你本应该6点钟到这儿。
(4)be supposed to…还可用于表示“被认为……,被相信是……”。
e.g.They are supposed to be very clever. 它们被认为很聪明。
This house is supposed to be his. 这所房子被认为是他的。
(5)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……”。
e.g.You are not supposed to do that. 你不应该做那件事。
【经典题例】
Animals are our close friends. We are supposed them.
A. to protect B. protecting C. protect
【答案】A
【解析】be supposed to do sth.“应该/ 被期望做某事”,所以选择答案A。
In the United States, they’re expected to shake hands.在美国,他们应该握手。
【知识详解】
(1)be expected to do sth. 意为“(某人)被期望做某事;应该做某事”,此处相当于be supposed to do sth.。
e.g.You’re expected to get good grades this term. 本学期你应该取得好成绩。
(2)expect及物动词,意为“期望;预料;期待”,后可接名词、代词、动词不定式或从句。其结构有:
expect to do sth. 期待做某事 expect sb. to do sth. 期待某人做某事
.I expect a letter from my family. 我期待一封家书。
She expects to come back next week. 她预计下个星期回来。
I expect you to do your duty. 我期望你能尽职尽责。
I expect that I’ll be back on Sunday. 我预计星期天回来。
【经典题例】
Mary is tired of learning because she is_____ to do better than she can, both at school and at home.
A. thought B. expected C. hoped D. helped
答案:B
【解析】考查动词辨析。句意:玛丽疲于学习,因为她在家里和学校被期待着做的更好。因为hope sb. to do sth.不正确,也无此类被动语态。故选B。
So I ju