This is a two page assessment with 18 items to test student's ability to identify and write simple and compound sentences. It can be printed front and back. The questions include several items where students can use their imaginations to connect the ideas, such as coming up with their own compound sentence connecting the words "cat" and "dog". The keywords are chosen to pique student interests.
This can be a summative or formative assessment, and can be given in chunks. You could even cut this apart and assign each section to one member of a group for a group review.