This method is very effective.

His smile was ephemeral, disappearing in an instant.

He is leading a religious life.

He started cleaning voluntarily.

A new approach is needed to solve this perpetual problem.

His house has a very modern design.

His secondary role greatly contributed to the success of the team.

She is learning the grammar of the present progressive form.

The characteristic of annelids is that their bodies are divided into ring-shaped segments.

He drew a straight line using a T-square.