He wrote the original lyrics of the song.

Shiba is my best friend.

Yushi is my best friend.

The interjection 'Ah!' expresses his surprise.

He expresses numbers using numerals.

In Chinese grammar, separable verbs play a very important role.

His speech skillfully used interjections, captivating the audience.

It's difficult to make sentences using interrogatives.

It's difficult to make sentences using infinitives.

She had been nursing her father for a long time.