The Raiders lost yesterday. My dad was very happy about it.
2. Combine these sentences with a coordinating conjunction: and, or, yet, but, so, nor (Don't forget the comma.)
The Raiders lost yesterday, and my dad was very happy about it.
3. Now combine the sentences with a semi-colon. (Remember, now you won't use a coordinating conjunction!)
The Raiders lost yesterday; my dad was very happy about it.
4. Finally, add a transition word, also called a conjunctive adverb, to make your sentence even more precise!
The Raiders lost yesterday; therefore my dad was very happy.