问题
选择题
-----He ought to have been warned of the danger.
----- ______ ,but he just wouldn’t listen to me.
A．So ought he
B．So he was
C．So he was
D．So he had
答案
答案：B
ought to have been warned of表示”本应该被告诫有危险“，是对过去动作的推测，因此回答也应该用过去时。A的构成形式不对。
【标签】固定句型和情态动词