Never Write-In All Capitalizations. Usually keep one space between each concept in a sentence. It’s also wise to keep a single space after each and every comma, semi-colon . Never leave a space in front of the punctuation at the end of a sentence. It’s traditional to leave two places between sentences. However, it is is now increasingly satisfactory to include only one area between sentences. Request your educator or teacher for her or his preference, if in question.