He took command of all the armies.

When I looked up at the night sky, I saw a beautiful asterism.

I saw a large crowd of elephants in the savanna.

His grandfather was a member of the Imperial Navy during World War II.

When he was young, he belonged to the Imperial Army.

She is good at playing the guitar, isn't she?

This furnace is very efficient.

Mom, will you make tea for me?

He proposed a new theory about the problem.

He is deeply researching that theory.