英语语法问题 情态动词

题目

英语语法问题 情态动词
1.he ought to have been warned of the danger.---?, but he just wouldnt listen to me.
the corract answer is SO HE WAS. why cant be SO HE HAD.
so he was = He was warned? so he had= he had beeen warned?
2.you---me up so early. i dont have to go to school today.
the corract answer is neednt have worken.
how about "dont need to wake"?

答案