He told the story using the past tense.

A dwarf star is a star that is smaller and less bright than the sun.

I often play checkers.

He is writing a sentence using traditional characters.

Keisei is a type of Kanji, consisting of parts that represent sound and meaning.

Our town is located at 135 degrees west longitude.

I support that plan.

I am majoring in embryology at university.

He corrected my mistake.

He helped me with the correction of my report.