I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

Please leave him alone.

The diamond sheds beautiful light when it receives the sun's light.

I think we should just leave him alone now.

His car is red.

The dress was entirely red and very vivid.

His hands were full of grime.

I think his behavior is the scum of society.

He just created a social media account.