Simple Subject & Simple Predicate. Common Core. This resource provides 3 worksheets (30 sentences in all) where students identify the simple subject. An additional copy of the 3 worksheets is provided which asks the students to identify the simple predicate. Finally, another copy is attached which requires students to identify both the simple subject and the simple predicate. This provides flexibility!!!! This is a great activity for classwork, homework, learning centers and extra support.