Completion count: 4,593
2027 online multiple-choice and fill-in-the-blank could exercises across 101 tests provide a wide range of sentences to help you grasp the context and usage/formation of the could/couldn't. Prepare for exams, practice could/couldn't online and verify your answers immediately. Expand your English grammar proficiency with interactive could couldn't modal mixed positive negative question form activities. Suitable for kids, adults, ESL learners at the beginner, elementary, and intermediate levels.