English How to use Punctuation Marks, Punctuation Marks, Definition and Example Sentences There are some punctuation marks that are commonly used in English grammar. They are the question mark, exclamation point, comma, semicolon, colon, parentheses, brackets, braces, apostrophe and ellipsis. Sentence Endings There are three punctuation marks for use as sentence endings. They are the question mark, the full stop and exclamation point. The period (.) mostly used at the end of the sentence, or a statement thought to be complete and after many abbreviations. A period can also be show the end of a group of words that don’t