哪is a common interrogative word in Chinese language often used to ask questions. However, some foreigners who study in Chinese language school may find it often appear in some daily fixed expressions. For example, 哪儿啊is often applied to show the fact does not conform to what the other party said. What’s more, it is more often used in dialogue with the acquaintances. For instance, 甲：小张，你怎么又迟到了？睡懒觉了吧？乙：哪儿啊，半路车坏了.

Another important and frequently used expression is 哪儿的话, which is used to mean it is not necessary to be so polite. For instance, 甲：耽误您这么长时间，真过意不去。乙：哪儿的话，你们能来，我很高兴. One thing that the students who learn Chinese online free should know is that it is usually used when the other party extends gratitude or apologizes to the speaker.

During the process when you are talking with Chinese friends, you may hear Chinese people often say哪儿跟哪儿啊. Then, you should know it means that what the other party has said is nonsense. Accordingly, you can say我们老师说男孩留长发不男不女的，不像个好人，你说这是哪儿跟哪儿啊.

When 哪里is used desperately in sentences, it doesn’t mean to ask question of “where”. Just like 哪儿啊, it is to mean the fact does not conform to what the other party has said. For example, 甲：听说你会弹吉他？乙：哪里，我连五线谱都不认识. The point needs the attention of those who study Chinese language is the repeated form 哪里哪里, which is applied to show that the speaker is not as good as what the other party has praised like. Usually, it carries the tone of modesty. For example, 甲：你的发音可真好。乙：哪里哪里.