Since it's my first language, I speak English very well.

It probably helps that I'm on a speech and debate team, though.

It's my first language, so perfect.

My english is quite good. I studied English for 5 years, so i can communicate even if i'm not perfect.

I'd say perfectly, but others would tend to disagree given the fact that my neighborhood is notorious for having the worst grammar in the city (apparently, anthropologists that have studied it have dubbed it an English dialect). Also, given the fact that there's so much French mixed in, its hard to speak properly.