Do this rarely. Quoting someone else's language and words to convey an idea without proper quotation or citation. Paraphrasing someone else's ideas, framework or insights without giving credit to the original author in a citation. The basic idea is that if an organizational framework, insight, characterization, opinion or interpretation is not your own, it should not be presented as if it were. Please note that I maintain a file of all previous semesters' papers.
Most term papers contain far too many quotations.
A typical term paper error is the disconnected quotation. This type of quotation diverts the reader's attention away from the text to the citation. If quotation is necessary, the original author usually deserves being mentioned in the text. On average, one or two quotations in an entire paper is sufficient. Quotations are best used when you want to describe the position or opinion of somebody important.