what
01
什么, 哪
used in questions to ask for information or for someone’s opinion
例子
What did you have for breakfast?
你早餐吃了什么？
02
什么, 的东西
used to represent an entire idea, concept, or clause within a sentence that acts as the subject or object of the verb or preposition
例子
I did n't understand what you said.
我不明白你说了什么。
what
01
什么, 哪
used to introduce a clause or phrase in a general manner
例子
I need to know what date you'll arrive.
我需要知道你什么时候到。
