english
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Phrase(s): One swallow does not make a summer. [and] One swallow does not a summer make. Prov. You should not assume that something is true just because you have seen one piece of evidence for it. • Amanda: I got a good grade on this quiz! My troubles in school are over. Nancy: One swallow does not a summer make.
McGrawhill's American Idioms And Phrasal Verbs