1704960936
857 supposed to
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1704960938
supposed to常可与不定式构成复合谓语，表示“应该”、“理应”：
1704960939
1704960940
He is supposed to arrive on the five o’clock train．他应该坐5点钟的火车到。
1704960941
1704960942
Summer is supposed to come in during May．夏天理应于5月开始。
1704960943
1704960944
Who is supposed to look after this room？这个房间应由谁负责？
1704960945
1704960946
不定式有时用进行形式或完成形式：
1704960947
1704960948
He is supposed to be washing his car．现在他应当在洗车。
1704960949
1704960950
You are supposed to have finished by now．你现在应该已经完成。
1704960951
1704960952
有时be supposed to表示“被认为”、“据信为”：
1704960953
1704960954
He was supposed to be a college graduate, but he knew nothing of history．他被认为是大学毕业生，但他对历史却一无所知。
1704960955
1704960956
Business was not as good as it was supposed to be．生意不如想象的那么好。
1704960957
1704960958
This stuff is supposed to kill flies. Let’s try it．这东西据说能灭苍蝇，咱们试试。
1704960959
1704960960
not be supposed to表示“不应当”：
1704960961
1704960962
He‘s not supposed to do that．他不应当这样做。
1704960963
1704960964
You‘re not supposed to know that．你不应当知道这事。
1704960965
1704960966
supposed to应读作/səˈpəustə/，不宜读作/səˈpəuzd tə/。
1704960967
1704960969
858 sure—surely
1704960970
1704960971
sure可作形容词，表示“肯定的”、“有把握的”（一般用作表语）：
1704960972
1704960973
I’m sure he meant well．我肯定他是好意。
1704960974
1704960975
He’ll be happy to come, I’m sure．我肯定他会高兴来。
1704960976
1704960977
I’m not so sure about that．我对此不太有把握。
1704960978
1704960979
还可用于be sure to，表示“一定（会）”：
1704960980
1704960981
She‘s sure to find out tonight．她今晚一定会发现。
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1704960983
He‘s sure to refuse．他准会拒绝。
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