Auxiliary Verbs: Do – Be – Have

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GRAMMAR LESSONS – English Grammar Lessons – Explanations of the all grammar points in English This category has the following features: * All of the essential points of English grammar are covered. * Each point of grammar is clearly explained, and is illustrated by examples. * For every important point of grammar, one or more exercises are provided, to make it easier to learn and remember the material. * Answers for the exercises are provided. * A summary of the uses and formation of the English verb tenses is given for easy reference. * Grammatically determined rules for spelling, pronunciation, and punctuation are included. * The grammar of North American English is emphasized. * Grammatical differences between formal and informal English are pointed out.