题目内容
12．I think she can finish reading the book in three days．（改为否定句）Idon'tthink she can finish reading the book in three days．
分析 我认为她能在三天内读完这本书．
我认为她不能在三天内读完这本书．
解答 答案：don't think．这里是主从复合句，含有宾语从句，主句的主语是I，谓语是think，改为否定句时，是将从句的否定转移到主句，think是实意动词是一般现在时，主语是I，故借助于助动词do加上not构成否定，故答案是don't think．
点评 将think，believe，suppose，expect，fancy，imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式．
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