He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

He is studying about ancient military tactics.

This is a linear mathematical problem.

This equation is linear.

They waged war against the enemy country.

The judge delivered a guilty verdict to him.

The judge sentenced him to life imprisonment.

He acted as the spearhead of our team.

My nephew will receive baptism at the church next week.