留学英语中常见的打招呼方式有：
正式礼貌
How are you？
How do you do？
I'm doing well.
How's everything going？
日常随意
Hey, how are you doing？
What's up？
Howdy!
What's up？
问候语
Hello.
Good morning.
Good afternoon.
I am Kate Green.
Are you Tom Brown？
Yes, I am.
How do you do？
How are you？
Fine, thanks.
其他
What do you think about it？
Is that right？
Absolutely right.
I think you're mistaken about that.
Is that ok？
That's ok/fine.
选择合适的打招呼方式取决于你与对方的关系以及场合的正式程度。希望这些建议对你有帮助，