Memorize Three Fundamental Capitalization Rules
Proper capitalization helps your writing look professional, and correct. Here are the three fundamental rules you can use to remember which words get capitalized in English:
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The first word in a sentence. You should always capitalize the first word in a sentence regardless of what type of word it is.
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Proper nouns (names). These include the names of people, locations, places, days and months, companies, etc. For example: Matthew, Helen, France, Tokyo, Mississippi, Microsoft, Saturday, January…
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Honorifics (почётный титул) and titles, as well as their abbreviations. Mr., Mrs., Ms., Miss, Doctor (Dr.), President, Lord, etc.
For more examples, Towson University has a comprehensive list https://webapps.towson.edu/ows/capitalization_rules.htm of words that get capitalized in English.