Question

15．我认为他这次考试不会取得好成绩，因为他没有准备好．
Idon't think he can get a good grade in this exam becausehe isn't ready for it．．

Answer 1

分析 don't think  he can get a good grade …he isn't ready for it．

解答 答案：don't think  he can get a good grade …he isn't ready for it．表达的客观事实用一般现在时，我认为I think，他不会取得好成绩he can't get a good grade，作为think 的宾语，故将否定转移到主句，故don't think  he can get a good grade，准备be ready for，主语he，故is，加上not构成否定，故答案是don't think  he can get a good grade …he isn't ready for it．

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．
　 I don't think I know you．我想我并不认识你．
　 I don't believe he will come．我相信他不回来．
注意：若谓语动词为hope，宾语从句中的否定词不能转移．
　 I hope you weren't ill．我想你没有生病吧．