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Grammarly
Grammarly Blog: Starting a Sentence With a Conjunction
An explanation with examples of the capitalization and punctuation rules for beginning a sentence with a conjunction.
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Grammar Monster: What Are Common Nouns? (With Examples)
Get a better understanding of nouns with definitions and examples of common nouns, examples of common and proper nouns, noun capitalization rules, common noun categories, and a video [5:21] on common and proper nouns.