I'm going to yell at my friend/partner for a project
In what way will you yell?
I will be really really sarcastic and I'll probably put on some acting to it
It's wrong to get into fights with project partners. You shouldn't be yelling at others either.
But I want them to know how lazy they are being.
That's understandable but you can simply ask them why they aren't doing their fair share of the work and if they still don't pick up the pace then you should tell the teacher.