一.如何打招呼
通用版:
1.How are you?
2.How are you doing?
3.How you doing?
4.How's it going?
4.How's everything going?
好久没见的朋友：
It's been a while. How've you been? 好久不见。最近怎么样
It's been a long time. What have you been up to? 好久不见。最近忙什么呢？
Long time no see. How are things treating you? 好久不见，过的怎么样？
熟人，非常不正式的场合，年轻人之间：
Hey, what's up?
Hey, what's going on?
回答时不用形容词 good/bad等词回答。
二.别人说thank you时该如何回答。
通用版:
1.You're welcome.
2.No problem.
3.No worries.
4.Don't worry about it. It's no biggie.
5.No sweat.
最好只在熟人之间用：
1.Sure.
2.Yeah.
三.别人说sorry时该如何回答。
通用版:
1.It's okay.
2.It's alright.
3.No problem.
4.No worries.
5.Don't worry about it.
6.Nah, it's no big deal.
7.No sweat.
最好只在熟人之间用:
Sure.
当然还有其他表达方法，但是这些是相对而言用的频率最高的一些。
