Completion count: 707
2114 online multiple-choice and fill-in-the-blank auxiliary verbs exercises across 101 tests provide a wide range of sentences to help you grasp the context and usage/formation of the auxiliary verbs (be/do/have). Prepare for exams, practice auxiliary verbs (be/do/have) online and verify your answers immediately. Expand your English grammar proficiency with interactive helping verbs (be do have) activities. Suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels.