作业帮---- Mary,how did your Math test go ---- I had thought I ______,but in fact I came in the top 10A.should have failed B.could have failed C.might have failed D.need have failed为什么选c 不选b
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---- Mary,how did your Math test go ---- I had thought I ______,but in fact I came in the top 10A.should have failed B.could have failed C.might have failed D.need have failed为什么选c 不选b
---- Mary,how did your Math test go ---- I had thought I ______,but in fact I came in the top 10
A.should have failed B.could have failed C.might have failed D.need have failed
为什么选c 不选b
---- Mary,how did your Math test go ---- I had thought I ______,but in fact I came in the top 10A.should have failed B.could have failed C.might have failed D.need have failed为什么选c 不选b
用于表示推测不确定情况的情态动词有4个：
must 表示十分有把握的肯定推测.
can 表示推测时,只用于否定句,表示十分有把握的否定推测.
should 表示根据科学理论进行推测.
may 表示没有把握的推测.
所以上题C正确,could not have failed 和 must have failed 都是正确的,但意思不同. 又因为后面说他实际上及格了,所以用may是最好的,因为他的推测并不正确.
从意思上来说，这里实际上她考得很好，所以她觉得她不及格的可能性很小
might比could的可能性小