regret后面接that从句,从句中的谓语用什么形式

We regret that we cannot repeat this article.
很抱歉,我们无法再次供应此物.
You may also regret that you only have two eyes.
也许你还会后悔只有一双眼睛…
We regret that we cannot supply them immediately.
非常遗憾,我们不能立即提供这批货物.
I bitterly regret that we haven't been able to do better.
我们没能做得更好一些,我深感遗憾.
I only regret that I have but one life to lose for my country.
我唯一遗憾的是：我仅有一次生命能够奉献给我的祖国.
就是最普通的从句.

动词原形。

regret that (should) do.记住那个should一般省略!