He is not necessarily wrong.

Before the exam, the teacher reminded us of the important points again just to make sure.

He was so nervous that his hands stiffened.

This material has ferromagnetism.

When the strong shaking occurred, we immediately evacuated.

He is a very patient person.

Just in case, let's bring an umbrella.

He has a habit of reciting the Nenbutsu every day.

He sent a reminder about tomorrow's meeting by email.

I reminded him about the meeting tomorrow.