I ( )Jack the( ) answer

题目

I ( )Jack the( ) answer
A,think; doesn't know B.don't think ; know C.don't think ; knows
D.think ; don't know

答案

正确答案应该是B,但你好像把句子写错了,应为I don't think jack know the anwser.因为像think,believe,imagine,suppose等词在句子中要否定时需否定前置,即在主句中否定,由于否定时用到了助动词,所以宾语的谓语动词用原形.