Grammar

the system and structure of a language usually consisting of syntax and morphology (including inflexions) and sometimes also phonology and semantics.

Passive Voice

How and when to use the Passive Voice  The passive...

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Modal Verbs

A request, permission, certainty, advice, threat, expectation, necessity, prohibition, lack,...

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Concepts of Verb Tense

Concepts of Verb Tense English tenses are used to express...

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