it is only put coordinating conjuction or subcoordinating or adverbs ;) thanks so much 8. Math is a pain. Grammar is worse. (compound sentence: coordinating conjunction) Answer: Math is a pain; moreover, grammar is worse. 9. I arrived. The big dog barked. (complex sentence) Answer: When I arrived, the big dog barked. 10. John bought some new shoes. He wore them to a party. (compound sentence: coordinating conjunction) Answer: John bought some new shoes, for he wore them to a party. 11. The apples weren't selling very well. He decided to have a sale. (compound sentence: conjunctive adverb)