This document discusses various punctuation marks used in English writing. It explains that capital letters are used at the beginning of sentences, for proper nouns like names and titles, and for the first letter of the names of days, months and festivals. Commas are used to mark pauses in sentences. Full stops are used at the end of sentences. Question marks and exclamation marks are used for questions and expressions of emotion. Apostrophes are used to show possession and omission of letters. Quotation marks enclose direct quotes. Semicolons, colons and hyphens are also briefly explained.