He is interested in diachronic linguistics studies.

He is interested in synchronic linguistics.

My class starts at eleven o'clock.

I eat lunch at twelve o'clock.

He has been committing misdeeds for many years, but finally the time for repayment has come.

Greenwich Mean Time is the standard that determines the time of the world.

He likes to take a walk in the park at dusk.

Excuse me, may I come in?

My friend lives in Ohio.

The olive ridley sea turtle is one of the smallest sea turtles in the world.