助動詞縛りは後半の「すべきだったのに」のほうか。 > I was surprised to hear that he failed the examination. > He was a man who should have passed it. さっさと模範解答へ。 > I was surprised that he should have failed in the examination; > he ought to have succeeded. む、"fail"の使いかたが・・・ちょっと考えれば、他動詞用法はおかしいことに気づくはずなのに、ああそれなのに。