The language used by courtesans during the Edo period, that's what 'Kuruwa Kotoba' is.

Shiba is my best friend.

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.

There are several words used as 働詞 in this ancient document.

The word 'hatarakikotoba' is used in this old document.

It's difficult to make sentences using interrogatives.

The interjection 'Ah!' expresses his surprise.

He expresses numbers using numerals.