Completion count: 389
1927 online multiple-choice and fill-in-the-blank when while exercises across 96 tests provide a wide range of sentences to help you grasp the context and usage/formation of the when vs while. Prepare for exams, practice when vs while online and verify your answers immediately. Expand your English grammar proficiency with interactive when or while activities. Suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels.