And this is Karl. He’s from Frankfurt.
这是卡尔。他从法兰克福来。
A I’ve got another friend coming in about 10 minutes. He’s coming direct from work, but he’ll be here soon.
A 10分钟以后我还有一个朋友要来。他下班以后直接过来，但是他很快就会到了。
B Who is he? Have we met him before?
B 他是谁？我们以前见过他吗？
A No, I don’t think so. He’s someone who works with me. A German guy.
A 不，我想你们没见过。他是我的同事。一个德国人。
B It’s always good to meet your friends.
B 见到你的朋友总是很高兴。
A Look, here he is – he’s early. Let me introduce him. This is Karl. He’s from Frankfurt.
A 看，他来了——他早到了。让我来介绍他。这是卡尔。他从法兰克福来。

Notes注释
If you are not sure and want to check if you’ve already done something, or met someone, or been somewhere, you can say: Have we met him before? / Have we met him before? : Have we been to that restaurant before? / Have we been to that restaurant before?
如果你对是否做过某事、见过某人或者去过某地不肯定，而你想确定一下，你可以说：Have we met him before? /我们以前见过他吗？Have we been to that restaurant before? / 我们以前去过那家餐馆吗？

Key phrases and sentences
I’ve got another friend coming in about 10 minutes. 
He’s coming direct from work, but he’ll be here soon.
Who is he? Have we met him before?
No, I don’t think so. 
He’s someone who works with me. 
A German guy.
It’s always good to meet your friends.
Look, here he is – he’s early. 
Let me introduce him. 
This is Karl. He’s from Frankfurt.

10分钟以后我还有一个朋友要来。
他下班以后直接过来，但是他很快就会到了。
他是谁？我们以前见过他吗？
不，我想你们没见过。
他是我的同事。
一个德国人。
见到你的朋友总是很高兴。
看，他来了——他早到了。
让我来介绍他。这是卡尔。他从法兰克福来。