非英语专业应该在大学里学英语吗？
这道题涉及到情态动词should的用法。
情态动词should的基本含义是表示应该做，且有一种道义上的责任，或者表示某种推测，暗含很大的可能。情态动词should还可以用于疑问句或感叹句中，表示感情色彩，用在从句中，表示虚拟语气。如：
How should I know?
When I was crossing the street, whom should I meet but Aunt Ann.
He took a cab to the station so that he shouldn’t miss the train.
It’s important that you should learn English well.
What have I said that you should get angry?
People should eat less and exercise more in order to keep healthy.
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