问题补充:
— You ought to have called her yesterday . — Yes , I know I .
A. ought to
B. ought to have
C. ought have done
D. ought to have called
答案:
A. ought to
B. ought to have
C. ought have done
D. ought to have called
解析:简单对话中,只重复助动、系动词和情态动词,如既有情态动词,又有助动词或系动词,则两者都重复,不重复行为动词。