Grammar present perfect

Grammar: - Unit 1: The present simple, the past simple, adverbs of frequency. - Unit 2: Wh - questions, gerund and to + Infinitive. - Unit 3: Past Perfect. - Unit 4: The + Adjective, used to + infinitive, which as a connector - Unit 5: Present perfect and the present Perfect passive, who, which, that. - Unit 6: The present progressive (with future meaning), be going to. - Unit 7: Because of and In spite of.

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