Modal verbs - english easy , Everyone can understand modal verbs! what are model verbs? model verbs are also called auxiliary verbs, helping verbs and model auxiliaries. model verbs are not. Present perfect - . english 2nd language, Present perfect the present perfect is one of the most difficult tenses to learn for intermediate level english learners. there are three main purposes for the. The passive voice - commnet, Verbals in passive structures. verbals or verb forms can also take on features of the passive voice. an infinitive phrase in the passive voice, for instance, can.
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