Sentences will be either fuzzy or accurate. If every element in a sentence is distinct and precise, this sentence is the ac-curate sentence. Fuzzy sentences emerged because of the economic principle of language. People want to express an utterance with vivid words and fewer words. They use some words or sentences, which can describe entities economically according to their habit. Apart from that, the classification of things existed in real world can be conceived as a mental process, it caused the category A and Non-A have no clear-cut boundary. All these reasons lead to the fuzziness in language, not only in written but also in communication words. In this paper, four basic functions of fuzzy sentences in some literary works will be analyzed as well as the boundary of these sentences to let readers know the enchantment of fuzzy linguistics.