Modify the meaning of sentences with opposite prepositions.   Students will modify the prepositional phrases within the given sentences to alter their meaning.   They will then create two sentences with opposite meanings using prepositional phrases before identifying pairs of opposite prepositions.   This resource contains three worksheet versions with different prompt sentences. Use it as an activity to gauge student understanding before teaching the concept, and then perform a summative assessment using the worksheet to determine whether your students’ skills have developed.