by Richard Brown · Vaughan Systems · libro de bolsillo · ISBN 9788416094691
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«Verbos Clave del Inglés: To Be» is Richard Brown's English grammar guide, published by Vaughan Systems in paperback (96 pages, in Spanish).
It analyzes the verb 'to be', the most used in English, meaning 'ser' or 'estar' and also acting as an auxiliary. Organized in three levels, it covers from basic uses and weather vocabulary to the passive voice, -ing and -ed endings, phrasal verbs and expressions with 'money', with explanations and practical exercises.
It is part of Vaughan's collection on the 8 key English verbs and includes downloadable MP3 audio to practice pronunciation and listening comprehension.
Aimed at English students from basic to advanced level who want to consolidate the essential verbs of the language.
British geologist and mining engineer (1805-1882)
