题目
They have done things that they ought______.A. not to doB. not to be doneC. not to have doneD. not having done
They have done things that they ought______.
- A. not to do
- B. not to be done
- C. not to have done
- D. not having done
题目解答
答案
C
解析
步骤 1:分析句子结构
句子的主干是 "They have done things",其中 "that they ought______" 是一个定语从句,修饰 "things"。
步骤 2:确定从句的谓语动词
从句的谓语动词是 "ought",表示 "应该",后面需要跟动词不定式。
步骤 3:确定动词不定式的时态
由于 "They have done things" 是现在完成时,表示已经完成的动作,因此从句中的动词不定式应该用完成时态,即 "ought to have done"。
步骤 4:选择正确的选项
根据以上分析,选项 C "not to have done" 符合语法要求。
句子的主干是 "They have done things",其中 "that they ought______" 是一个定语从句,修饰 "things"。
步骤 2:确定从句的谓语动词
从句的谓语动词是 "ought",表示 "应该",后面需要跟动词不定式。
步骤 3:确定动词不定式的时态
由于 "They have done things" 是现在完成时,表示已经完成的动作,因此从句中的动词不定式应该用完成时态,即 "ought to have done"。
步骤 4:选择正确的选项
根据以上分析,选项 C "not to have done" 符合语法要求。