情态动词有关的英语题目Sir,you _____ be sitting in this waiting room.It is for the women and children only.A oughtn't to B can'tC needn't D won't很弱智,但我总是分不清A和B为什么是A对.

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情态动词有关的英语题目Sir,you _____ be sitting in this waiting room.It is for the women and children only.A oughtn't to B can'tC needn't D won't很弱智,但我总是分不清A和B为什么是A对.
情态动词有关的英语题目
Sir,you _____ be sitting in this waiting room.It is for the women and children only.
A oughtn't to B can't
C needn't D won't
很弱智,但我总是分不清A和B为什么是A对.

情态动词有关的英语题目Sir,you _____ be sitting in this waiting room.It is for the women and children only.A oughtn't to B can'tC needn't D won't很弱智,但我总是分不清A和B为什么是A对.
Can是强调能力,这个人当然是有能力坐在候车室,选B就是说他没有能力坐那里.所以不选B

本题中 A表示的是情理上应该不应该
而B表示的是可能性上的推测。而这里表示的是情理上“你不应该坐在这间屋里”。