auxiliary verb

These are verbs that help to make tenses, negative statements, questions etc. In English, 'be', 'have' and 'do' are auxiliary verbs. Here are the most basic rules:

  • be (e.g. am, is, are, was, were) + ing = continuous aspect
  • have/has/had + past participle = perfect aspect
  • don't/didn't + infinitive = simple aspect

» 7.1 Glossary - Key language concepts