You ought to have given them some advice.
______ ,but who care what I say.
A,So I ought B,So I have C,So I did
怎么做呢?
这里还牵涉到不定式的省略?指哪里呢?
麻烦分析一下本题
答：C
译：你本该给他们一些劝告的.（你本应该劝他们一下的）
我劝了啊!可谁会再乎我说什么啊!
分析：本题中ought to=should,ought to have done sth.= should have done sth.都表示本该做而没去做的事.有过后批评,指责的意思.
回答者如果同意对方的意见,说：是的,我是应该这么做了的.则应说：Yes I ought to have done it.= Yes,I should have done it.但常用省略句.而前一句就涉及到了不定式的省略了.当不定式中有have,be动词时,省略时要保留这个have/be,所以如果选A,则应改为：So I ought to have.
如果对方说：you ought to do sth.你表示同意,则可答：yes,I ought to.