---I did not go to see the doctor yesterday .--- but you ____A ought to B ought to have的详解

题目

---I did not go to see the doctor yesterday .--- but you ____A ought to B ought to have的详解

答案

B ought to have done 和 should have done 意思相同,表示本该做某事,但事实上并没有做.我昨天本应该去看医生的.