作业帮Sir,you_____be sitting in this waiting-room.It is for women and children only. A.can’t B.shouldn't C.won’t D.needn't请帮忙解答一下为什么正确答案是B,而不是A呢?
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Sir,you_____be sitting in this waiting-room.It is for women and children only. A.can’t B.shouldn't C.won’t D.needn't请帮忙解答一下为什么正确答案是B,而不是A呢?
Sir,you_____be sitting in this waiting-room.It is for women and children only.
A.can’t B.shouldn't C.won’t D.needn't
请帮忙解答一下为什么正确答案是B,而不是A呢?
Sir,you_____be sitting in this waiting-room.It is for women and children only. A.can’t B.shouldn't C.won’t D.needn't请帮忙解答一下为什么正确答案是B,而不是A呢?
=== I don't think you should be - - -- -
根据规定或者常理,你不可以- - - -- .
又如：John,you shouldn't play computer games all the time because you will have two tests tomorrow.So stop to go over your lessons.
B，不应该，也有不可以的意思
of course B.因为该候机厅是专供妇孺的，你个大男人不该坐那儿。
这里考的是语气，can't是不能，很强烈的语气，也很礼貌。
shouldn't 不应该 这样就是很舒缓的语气了。并且前面用sir来做称呼。也可以看得出来，说话的人很有礼貌。
ought / should 与进行式连用，不是表示动作正在进行
ought / should 与进行式连用时表示表示主语没有履行其义务，做了愚蠢、鲁莽的事等或做事不明智、不慎重等：
He ought to be studying for his exam. He shouldn't be spending all his time on the beach.
他本应该正...
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ought / should 与进行式连用，不是表示动作正在进行
ought / should 与进行式连用时表示表示主语没有履行其义务，做了愚蠢、鲁莽的事等或做事不明智、不慎重等：
He ought to be studying for his exam. He shouldn't be spending all his time on the beach.
他本应该正在学习以备考试。他不该把他的全部时间都在海滩度过。
We should be wearing seat belts.
我们应该系好安全带。（但我们没有系安全带）
I shouldn't be telling you this. It's supposed to be a secret.
我不应该告诉你这件事。这是个秘密。
题目里面说是房间时为女人和小孩使用的，按道理男人是不能坐在那里的。此外，can后一般不接进行时，表“许可”时一般接不带to 的不定式，也就是动词原形。
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