used to represent an entire idea, concept, or clause within a sentence that acts as the subject or object of the verb or preposition
什么
used to represent a clause, idea, or concept that acts as the subject or object of the verb or preposition
哪个
used to represent the time when something happens as the subject or object of verb or preposition
什么时候
used to represent the place where something took place as the subject or object of verb or preposition
哪里
used to represent a person as the subject or object of verb or preposition in a sentence
谁
used to introduce the reason for an action as the subject or object of the verb or preposition
为什么
used to represent the manner, method, or means of fulfilling an action as the subject or object of verb or preposition
如何
used to represent the person who receives the action of the verb in the relative clause as the subject or object of verb or preposition
谁
used to represent anything or everything as the subject or object of verb or preposition
任何东西
used as a placeholder of object of verb or preposition in the sense of any person who
任何人