Students practice writing compound sentences in this one-page grammar worksheet! A compound sentence is two simple sentences joined together with a comma and a conjunction. This worksheet, geared toward third- and fourth-grade learners, begins with a brief review of compound sentences and a diagrammed example. Then students are asked to write five compound sentences of their own, circling the conjunction and underlining the two simple sentences being combined. This helpful writing worksheet is a fun way to introduce a little creativity into students' grammar practice, while also helping to strengthen their writing skills and add variety to their sentence structure. Round out students' learning with the Write Simple Sentences and Write Complex Sentences practice worksheets!