"Where" is used in Engpsh to ask about the location or location of something. For example:

Where is the pbrary? (问图书馆在哪里？)
Where are you from? (你来自哪里？)

"How" is used in Engpsh to ask about the way or manner in which something is done. For example:

How do you get to work? (你怎么去工作？)
How do you make a cup of tea? (你怎么做茶？)

"What" is used in Engpsh to ask about the identity of something or to ask for information. For example:

What is your name? (你叫什么名字？)
What is the capital of France? (法国的首都是哪里？)