You'd better watch your step or you'll get into trouble again.
你最好留点儿神, 免得再惹麻烦。
It's wrong to break the law.
犯法是不对的。
Of course he is. He's very successful. He's made lots of records. They broadcast a programme of his music last month on the radio. Why don't you come on Saturday? I think you'd enjoy it.