Run-on Sentences:
1. The dog barked at the mailman he was scared of the loud noise. (This sentence contains two independent clauses without proper punctuation or conjunction.)
2. The train arrived at the station it was packed with people. (Similar to the first example, two independent clauses are joined without proper punctuation or conjunction.)
3. My favorite color is blue I like it because it reminds me of the ocean. (This sentence combines two independent clauses with only a comma, creating a comma splice.)
4. The storm raged outside the wind howled and the rain beat against the windows. (This sentence contains three independent clauses without any punctuation or conjunctions to separate them.)
5. The children played in the park they laughed and ran and chased each other. (This sentence also combines multiple independent clauses without proper punctuation or conjunctions, creating a run-on sentence.)
Comma Splices:
1. The cat sat on the mat, it watched the birds outside the window. (This sentence contains two independent clauses joined only by a comma, creating a comma splice.)
2. I went to the store, I bought some milk and bread. (This sentence also uses a comma to join two independent clauses, resulting in a comma splice.)
3. The sun is shining, it's a beautiful day. (Two independent clauses are improperly joined by a comma, resulting in a comma splice.)
4. The movie was long, I still enjoyed it. (The comma incorrectly joins two independent clauses, creating a comma splice.)
5. The cake was delicious, everyone wanted more. (This sentence uses a comma to join two independent clauses, resulting in a comma splice.)
Note: These are just a few examples. There are many other ways to create run-on sentences and comma splices. If you are unsure whether your sentence is grammatically correct, it's always best to double-check your work!