【问】You are quite right：I’m inferring in my comments that McGraw had not ought tohave broken in the room without my permission

请分析句中的错误。

out of date/out-of-date

【答】 ought to没有单独的过去时形式，其否定形式为ought not to或oughtn't to，没有didn't ought to和had not ought to这些形式。如果指过去的“义务”，则ought to之后应跟完成时动词不定式：

1. I ought to have helped her，but I never could. (Snow)

我本应当帮助她，但我却总是爱莫能助。

2. You oughtn't to have spoken to her in that way. (Shaw)

你本不应该用那种态度对她讲话。

上面的试题，便属于此种用法。因此，应将C项中的“had not ought to”改为“oughtn't to”或“ought not to”。