考研英语语法速成：几个情态动词常考句型
1)．may/might (just) as well “不妨，最好”，与had better相近；Since the flight was cancelled, you might as well go by train.
既然航班已经取消了，你不妨乘火车吧。相当于you had better go by train。
2) ．cannot / can’t…too …“越……越好，怎么也不过分”。注意这个句型的变体cannot…over….如：
You cannot be too careful when you drive a car.驾车时候，越小心越好。
The final chapter covers organizational change and development. This subject cannot be over emphasized .
3) ．usedn’t 或did’t use to 为used to (do) 的否定式。
4）．should 除了“应该”一层意思外，考研大纲还规定要掌握其“竟然”的意思。如：I didn’t expect that he should have behaved like that. 我无法想象他竟然这样做。
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