教留学生室友口语时，可以使用以下几种表达方式：

问候和自我介绍

Hi/Hello/Hey, how are you？/How's it going？/What's up？

I'm good/fine/OK, thanks. And you？

Nice to meet you.

询问室友情况

How have you been？

What's up？

Have you been busy lately？

描述室友

My roommate is a really nice guy.

He's very friendly and helpful.

She's a good student and speaks four languages.

表达感谢或歉意

Thanks for asking.

No worries.

Excuse me.

I'm sorry.

讨论共同生活

So, how do you like living with your roommate？

Do you get along well with your roommate？

There are some things we need to talk about regarding our living arrangement.

这些表达方式可以帮助你与留学生室友进行基本的口语交流，建立良好的关系。