1. He's a bad person, and I am a good person. So please don't associate him with me.2. What happened this time is different from what happened last time. They are two completely different issues. How can you discuss them together as if they are the same issue?
 associate A with B discuss A and B together mention A and B together treat A and B the sameDon't associate him with me. = 別把我跟他相提並論
My sister is bad-tempered and would sna at anybody whenever she feels like it.