Sentences The Emacs commands for manipulating sentences and paragraphs are mostly on Meta keys, so as to be like the word-handling commands. Neither one moves over the whitespace at the sentence boundary. With minus one as an argument it kills back to the beginning of the sentence.
Larger arguments serve as a repeat count.
This command is useful when you change your mind in the middle of composing text. A sentence also begins or ends wherever a paragraph begins or ends. The variable sentence-end controls recognition of the end of a sentence. It is a regexp that matches the last few characters of a sentence, together with the whitespace following the sentence. This example is explained in the section on regexps.