Question

帮忙解决几个情态动词的选择题，需要详细理由！

1.Look at the sign,you ____ park here.

A.can't B.mustn't C.may not D.shouldn't

2.It's nearly seven o'clock,Jack ____ be here at any moment.

A.can B.may C.should D.will

3.---When can I come for the photos ?I need them tomorrow afternoon.

---They ____ be ready by 12:00

A.must B.should C.might D.need

4.Tom,you ____ leave all your clothes on the floor like this!

A.wouldn't B.mustn't C.can't D.may not

需要详细理由，好的话追加分数。。

Answer 1

1。A.must必须。mustn't明令禁止
2。B.这里情态动词表推测，四个选项里只有B可用于肯定句中表推测。A只能为can't形式，译为绝不可能
3。C。解释同第二题
4.C.同上
情态动词表推测的很固定。只有must必须，may、might可能，can't不可能。其他的虽然也是情态动词，但无推测之意
mustn't是规则，法律上的禁止，很严厉。shouldn't是不应该，情理和道德上的。要区分开
建议您选一本语法书，把情态动词都有哪些，他们分别都有什么用法好好总结一下。我刚高考完，平时英语也是强项。一直这么总结的，效果很好。

Answer 2

1B 2C 3D 4C