native speaker 们在生活中到底是怎么打招呼的？

native speakers 在生活中到底是怎么打招呼的？

In the United States, people often say:

(Formal, you have to answer)
How are you? (I am great/fine/OK. How about you?)
How are you doing? (I am doing great/fine/OK. And you?)

(Informal, you have to answer)
Waht's up? (Great/fine/OK/not so bad/So So/terrible..)

(Informal, you don't have to answer)
Hi dee! (come from "Hi Dear" from southern people)
Hello!

In England, people still say:

(Formal, you don't have to answer)
How do you do? (How do you do?)

How are you!
How are you doing?

Hey, guys.
当然说How are you?或How are you doing?

有人说how are you
很少听人说how do you do.
很多朋友之间就用 yo, dude./hey man./how are you doing 之类的。

yo man!
what' up!

一般说hello或Hey, guys. 等,how do you do 是初次见面在正式场合用的,也就是陌生人在正式场合用, how are you 用的稍多,关系不是太好,或者比较正式才会用.