believe的形容词的反义词是什么

例句：

Many local people believe the development will profit them.

当地的'许多人认为，这项开发将对他们有利。

I can't believe how much better I feel.

真想不到我觉得好多了。

It would be interesting to know what he really believed.

了解他的真实信仰会是很有意思的。

If you don't believe me, go and see for yourself!

要是不信我说的，你自己去看看！

People used to believe the earth was flat.

人们一度认为地球是平的。