She lays a lot of emphasis on the usage of prepositions.

她把重点放在介词的使用上。

Prepositions and conjunctions are particles.

介词连词是小品词。

Then ask if someone with a preposition flashcard can make a sentence including both the noun flashcard and the preposition flashcard.

然后问哪位拿着介词动画卡片的同学能够造一将这名词介词都能用上的句子。

This paper gives the kinds of complements: noun clauses which function as subject and object; tenseless embedded sentence; noun clauses governed by prepositions.

本文概括了补语的各种类型：限定补语、非限定补语介词引导的补语。