Although one of the most widely-used verbs in the English language, the verb "to be" is probably also the most irregular and uncertain. Constantly changing form, it's tense varies with the rest of the sentence, making it one of the most difficult grammar concepts to pin down. Help your child get the hang of it with this colorful worksheet that explores this difficult-to-master verb.

Want more? Try out the rest of the Get into Grammar series for more practice.