带有to的不定式怎样变被动语态?
3个回答

楼上说的对,但跟问题中的例句似乎关系不大.

ought to do中,to do并不是不定式,ought to 应看作一个整体,相当于一个情态动词,所以这个句子变不定式应按情态动词的变法:

can do --> can be done

ought to do --> ought to be done

People oughtn't to criticze her for this matter.

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She oughtn't to be criticized (by people) for this matter.