如果他再打电话给我，我将通知警方。

If he calls me again, I shall ___inform the police.

我通知了我的老板我下周要离开。

I ___informed my boss that I was going to be away next week.

这封信是为了通知您，由于健康问题，我将无法参加明天的课程。

This letter is to ___inform you that I will not be able to attend tomorrow's class due to medical issues.