adverb

 

way used to ask about the way something happens or is done

How did he die?

 

quantity used to ask about quantity, size, or age

How big is the house?

 

emphasize used before an adjective or adverb to emphasize it

I was amazed at how quickly she finished.

 

health used to ask about someone's health

How are you feeling today?

 

situation used to ask about the success or progress of a situation

How's everything going?

 

conjunction

 

used to talk about the way that something happens or is done

I don't know how to turn the video on.