I. Introducing someone to someone else (사람을 소개시켜줄때)                                                
I'd like you to meet (my friend) Mary.                
This is (my friend) Mary.                                        
Mary, have you met John?                                                
Mary, do you know John?                                                
Do you two know each other?                                                
Have you met?                                                        
Have you to been introduced?                                                
Haven't you been introduced?                                                
Mary, John is the guy I was tellin you about. (informal)                                                        

II. When you have just been introduced to someone (사람을 막 소개 받았을때)                                                        
Good to meet you./ Nice to meet you./ Nice to meeting you.                        
How nice to meet you. (informal)
What a pleasureto meet you. (informal)
I'm happy to meet you.
I'm glade to meet you./ Glade to meet you.

III. After you have been introduced to someone (사람을 소개받고 난후)

I've been wanting to meet you for some time.
John has told me all about you.
John has told me so much about you.
I've heard so much about you.
I've heard so much about you I feel I know you already.
So we finally meet face to face.
I'm sorry, what was your name again?
I didn't catch your name.  I am terrible at names.

IV. Asking how someone is (상대방의 안부를 물을때)
How are you?
How is your family?
How are you doing?
How you doing?
Are you doing OK?
How are you feeling?/ How you feeling?
Are you feeling better today?
how have you been?/ How you been?

V. Asking someone how things are going (요새 어덯게 지내냐고 물을때)

How're things?/ How're things with you?/ How're things going?
How's business?/ How's everything?/ How's everything going?
How's it going?/ How goes it?
How goes it with you?
How are you getting on?
How are you getting along?
How's the world (been) treating you?