Many example for compund-complex sentence in short sentence only?

1. She went to the store, but she forgot to buy milk because she was in a hurry.
2. The dog barked loudly, and the cat ran away when the thunderstorm started.
3. He studied for hours, yet he still failed the exam because he didn't understand the material.
4. The children played outside, but they had to come in when it started to rain.
5. She cooked dinner while he set the table, and they ate together when everything was ready.