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The English language (and all languages) is filled with rules regarding types of word (nouns, verbs, adverbs, adjectives, contractions, pronouns, prepositions, possessive pronouns, synonyms, antonyms and the like), sentence structures (simple, compound, complex and compound-complex) and punctuation marks (period, question mark, exclamation point, colons, semicolons, commas, quotation marks and the like) and their correct usage and their placements in writing.
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