见面之前应该怎么说英语

There are many ways you can greet someone in English before meeting them in person. Here are a few options:
"Hello! It's nice to meet you."
"Hi there! How are you doing?"
"Good morning/afternoon/evening! It's a pleasure to meet you."
"Hey, it's great to finally meet you in person."
"Hello! I'm looking forward to meeting you."
It's always a good idea to be polite and friendly when greeting someone, and to show enthusiasm for meeting them. You can also ask how their day is going or if they had a good trip, if applicable.