这个句子是主语从句还是宾语从句?

题目

这个句子是主语从句还是宾语从句?
It is still hard to predict who will win the next presidential election.
说是主从的话，那predict是及物动词，这句话没宾语啊？
不应该改成It is hard to be predicted who will win the next presidential election.

答案

It is still hard to predict who will win the next presidential election.整个句子是个由”It“引导的主语从句,而“who will win the next presidential election"是宾语从句,作为"predict"的宾语；句子的谓语是"...