英语宾语从句中从句什么时候能省略掉主语和谓语?

题目

英语宾语从句中从句什么时候能省略掉主语和谓语?
太久没碰英语了,今天看了一下有点晕了.比如有一句She proved adequate to the job.完整应该是She proved that she is adequate the job.为什么它这里可以省略掉she is?
是She proved that she is adequate to the job才对，打快了。

答案