My soccer team won the soccer game, but I scored the most goals.
One example is that you need to have a subject and a verb.
Another thing is that compound sentence needs to have 2 sentence hooked together never splited.
The 3rd thing in compound sentences is that most of the time ; semicolon are in sentences. In compound sentence you can either choose to put a comma of a semicolon in the sentence. The words that can be use are so,and,but and or. Those word are only for using comma in a sentence.
One example before I go to schools is "John likes to play video games, but he doesn't like to play alone."
"Oh,no I'm late I got to go. Hope you learn something to day HAVE A NICE DAY."