我每天要带三本课文去上学。

Wǒ měitiān yào dài sān běn kèwén qù shàngxué.

I have to take three textbooks to school every day.

这本书很有趣。

Zhè běn shū hěn yǒuqù.

This book is really interesting.

我买了一本书。

Wǒ mǎi le yì běn shū.

I bought one book.