（我选D,不理解）boy:I don`t suppose Jim could have done well in the mid-term exam last week,( ) girl:( ),he almost failed in the exam.A.had he ；YesB.did he ；NoC.do I ；YesD.could he ；No为什么用 did he 而不用could he？（语法

Question

（我选D,不理解）
boy:I don`t suppose Jim could have done well in the mid-term exam last week,( )
girl:( ),he almost failed in the exam.
A.had he ；Yes
B.did he ；No
C.do I ；Yes
D.could he ；No
为什么用 did he 而不用could he？（语法我忘了）

Answer 1

陈述部分含宾语从句时,疑问部分通常与主句一致.但当主句的谓语动词是think,believe,suppose等且主语是I ,we时,即：
I / We think (believe)（suppose) + 宾从,则附加问句应与从句一致.
而本句,翻译为“我认为他本不可能在上个星期的期中考试中发挥得好”是表猜测的句子,意思是“他做到了”.
表推测的情态动词的附加疑问句,其附加疑问句与情态动词后的动词一致.
而本句是明显的过去猜测的句子,由last week也可推知是过去的动作,所以用did