regret可数吗

例句：

He was to regret that decision for the rest of his life.

他终生都将后悔作出了那一决定。

She has not shown any real regret for what she did.

她对自己做过的事还没有表现出真正后悔的样子。

The decision could be one he lives to regret.

这一决定也许会有让他后悔的一日。

He gave up teaching in 2001, much to the regret of his students.

他于2001年放弃了教学，这使他的`学生深感遗憾。

She was to regret her words before the day was out.

她到不了天黑就会为自己说的话后悔。