Question

英语高手进，帮我解答一下，谢谢，

At that time people would starve if food was difficult to find,especiallyduring the cold winter months.
在那个年代，如果食物难以找到，特别是在寒冷的冬天，人们就会挨饿。
食物不是被找到吗
It is impossible for my question to be answered in his absence.
他不在，我这个问题不可能答复。
这两句相比，为何一个不用被动语态，而另一个要用？有何区别？

Answer 1

to find作为表语difficult的补足语，to be answered是被动式

追问

请根据我的问题帮我再详细的解答一下，好吧，谢谢啦！

追答

At that time people would starve if food was difficult to find,especiallyduring the cold winter months.
也可以说成At that time people would starve if it was difficult to find food,especiallyduring the cold winter months.
It is impossible for my question to be answered in his absence.
则可以说成 For my question to be answered is impossible in his absence.

Answer 2

sth/sb be+adj+ to do的结构本身就包含被动的意思