I believed tomorrow would be better.对吗.

问题描述:

I believed tomorrow would be better.对吗.

对.
因为用了一般过去时,意思是,我以前相信,明天会更好.(现在可能不相信了.)
如果要是,我相信,明天会更好,应该用一般现在时:
I believe tomorrow will be better.
或者:
I believe things will be better tomorrow.