'Intonation' refers to your tone of voice rising or falling.In English ,there are two main types of questions:yes/no questions and wh- questions.When your question is answered with yes or no like ,"Can you swim?",your tone of voice goes up at the end.It is like the last word is the most important word in the question. However,when the question starts with words like what or how like,"What time is it?",your tone of voice drops at the end.Watch the video for real examples.
