I have to prepare for tomorrow's class tonight.

He told me the whole story of the incident.

He is interested in toponymy.

He has a deep interest in toponymy.

His toponymic surname indicates the region from which his family originates.

He has already finished writing the report, so we use the present perfect form.

Right now, I am in Tokyo.

I am learning how to use the present participle in English.

The present tense is used to express things that are happening now or general facts.

The culture of classical antiquity has a significant impact on the modern world.