Use ellipsis to indicate something is omitted from a direct quotation or to suggests and so on. . ., i.e., something the reader already knows that doesn’t need to be repeated.
What is an ellipsis?
An ellipsis is a punctuation mark that consists of three dots with a space before, after, and between them. Writers use this mark to represent a word, phrase, sentence (or more) that is omitted from a direct quotation.
How should ellipses be used?
When words are omitted from within two nearby sentences, insert the ellipsis in place of the omitted words.
- Quotation with an ellipsis taking the place of omitted words within nearby sentences:
- “With her eyes on her phone . . . [Harden] lost control of the vehicle, and it slammed into a parked car and then a rock wall” (Weir 1). 
Note: Spaces are placed between the dots, as well as before and after them.
When words are omitted following a complete sentence, include the sentence’s end punctuation followed by the ellipsis.
- Quotation with an ellipsis taking the place of omitted words after a complete sentence:
- “Driving, texting, and talking on the phone are all cognitively complex tasks; they require sophisticated brain functions such as memory, attention, problem solving, and decision making. . . . [but] the brain can’t perform two cognitively complex tasks at the same time” (Weir 2).
Note: The period appears at the end of the sentence and is followed by the ellipsis and another space.
Avoid misuse of ellipses
- Do not use ellipses at the beginning or end of a quotation.
- Do not use ellipses to alter the author’s originally intended meaning.
For additional information on ellipses:
 Weir, Kirsten. “Driven to Distraction.” Current Science. Weekly Reader Corporation, 11 Mar. 2011. Web. 20 Mar. 2012.