He recognizes the danger of extremism.

Echinoderms are a type of marine life, many of which have star-shaped bodies.

He was diagnosed with bipolar disorder.

He sharpens his sword every day.

I contacted him beforehand.

By learning the imperfective form, you can understand Japanese grammar more deeply.

He was fulfilling his role as a governor.

He made excellent use of that opportunity to fully demonstrate his abilities.

He excels in the ability to command English.

He damaged his motor nerves in an accident.