Seisaku is my best friend.

As a preventative measure against the new coronavirus, we recommend washing hands and wearing masks.

We need to find a plan to make a breakthrough for this problem.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

He is learning how to use gerunds.

He continued hard labour all day long.

I perform work every day.

This machine is driven by electricity.

This earthquake caused a large motional disturbance.

He was emotionally disturbed when he heard the news.