The verbs be (is, am, are, was and were), have and do are called auxiliary verbs when they are used with ordinary verbs to make tenses, passive forms, questions and negatives...
American English File Second Edition retains the popular methodology developed by World-renowned authors Christina Latham-Koenig and Clive Oxenden: Language + Motivation = opportunity. With grammar, vocabulary, and pronunciation practice in every lesson, students are equipped with a solid foundation for successful speaking.
American English File Second Edition retains the popular methodology developed by World-renowned authors Christina Latham-Koenig and Clive Oxenden: Language + Motivation = opportunity. With grammar, vocabulary, and pronunciation practice in every lesson, students are equipped with a solid foundation for successful speaking.