35. We shall lock the house up for summer and the old gardener will look after it.
\Rightarrow The house will be locked up for summer and looked after by the old gardener
36. One cannot eat an orange if nobody has peeled it.
\Rightarrow An orange cannot be eaten if it hasn't been peeled
37 Did anybody ever teach you how to behave?
\Rightarrow Were you ever taught how to behave?
38. It surprised me to hear someone had robbed you.
\Rightarrow I was surprised to hear you had been robbed
39. People ought to tell us how much they expect of us.
\Rightarrow We ought to be told how much is expected of us