3. Sentences? When I go to the store. Even though Jim does not believe in fighting. I buy milk. He really enjoys watching WWE. Are the first sentences okay now that we added the second sentence to them? We can see that these sentences are incomplete. Lets add to them. Absolutely NOT Think of a period as a wall. It completely separates two ideas.
4.
5. Sentences? When I go to the store Even though Jim does not believe in fighting I buy milk. He really enjoys watching WWE. If the idea cannot stand alone, it cannot be separated by a period.