You ought to have helped him with his Englis,(

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You ought to have helped him with his Englis,(
2.We ought to help each other in our work,(
为什么前面用shouldn't you后面用oughtn't we?
有什么区别么
选项里是shouldn't 和 oughtn't都有啊，肯定有区别

第一个是本应该,是对过去的看法,反义疑问句用过去时,是说当时是吗
第二个两个都可以

helped him with his math His friend said to him "Did you have ( 1 ) trouble with you “Do you want to have lunch with me?”His father said to him.把 I __like to have a talk with you.Ahave to B shall C ought to You have to replace him,he fell in Love with If you want to go shopping with him,you have to wait for him should/ ought to have You ought not to have hurt my feelings.什么意思 It's a hard work for him to talk with every student( )Englis help,can,you,his,chinese,with,him They decide to help him with his homework problem翻译 I have n His old friends will come to have dinner with him tonight.改为