The lyrics of this song are very deep.

She is learning how to use prepositions in Chinese.

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.

The interjection 'Ah!' expresses his surprise.

He expresses numbers using numerals.

Yushi is my best friend.

That person is my friend.