有关情态动词表推测的问题例1：Conserding his ability and experience,he ____ better.A.can have doneB.might have done应该选B,老师说没有can have done,因为can表能力时有时态区别,所以只有could have done,但有can't have

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有关情态动词表推测的问题例1：Conserding his ability and experience,he ____ better.A.can have doneB.might have done应该选B,老师说没有can have done,因为can表能力时有时态区别,所以只有could have done,但有can't have
有关情态动词表推测的问题
例1：Conserding his ability and experience,he ____ better.
A.can have done
B.might have done
应该选B,老师说没有can have done,因为can表能力时有时态区别,所以只有could have done,但有can't have done,这是can表推测,没有时态区别.（说的对吗?）
但这里用might,might不也表推测吗?为什么不能是选A,can表推测?难道can只能做否定推测以及客观推测?
还有,关于should的用法,should也可表推测吧,“他应该是最高的孩子”应该是什么?“He may be the tallest boy.”should can行吗?并请给出解释.
例2.-I can't find my purse.
-You ___ have lost it while shopping.
A.may B.can C.should
其他两个为什么不行呢?

有关情态动词表推测的问题例1：Conserding his ability and experience,he ____ better.A.can have doneB.might have done应该选B,老师说没有can have done,因为can表能力时有时态区别,所以只有could have done,但有can't have
老师说的是对的,can't 是不可能的意思,如：I heard that Tom was singing in the room,so he can't be in school now.
用can时表示能力,作为情态动词使用时为could形式 .
例二这道题目里面,用should的话就变成了should have done译为本来应该做sth,所以不选.用can的话表示的是能力,不行,如：Tom can play basketball very well.最初的知识,不要忘了,要注意各种知识点之间的融会贯通才行.

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