cooperated
協力した
解説 Definition
cooperated は cooperate（協力する）の過去形・過去分詞です。人や組織が共通の目的のために協力したことを表します。
Cooperated is the past tense and past participle of cooperate. It describes people, groups, or organizations that worked together, followed requests, or coordinated their actions in order to achieve a shared result.
覚え方のコツ Memory Tip
cooperated は cooperate の過去形・過去分詞で、語末が e なので -d だけを加える。co-「共に」と operate に通じる「働く」を意識し、teams cooperated on a project、cooperated with staff の形で覚える。helped よりも、共通目的のため双方が連携した感じを表す。
See cooperated as cooperate plus -d, because the base verb already ends in silent e. Its internal structure reflects the idea of working together: co- suggests “together,” while the historical root is related to work and to operate. Learn it with the patterns “cooperated with the staff,” “cooperated on the project,” and “cooperated to create a safer route.” Unlike simply helping once, cooperating often suggests that two or more sides coordinated their behavior toward a common goal. The -ed ending is pronounced /ɪd/ because cooperate ends in a /t/ sound.
例文
The two teams cooperated on the project.
2つのチームはそのプロジェクトで協力しました。
She cooperated with the staff during the event.
彼女はイベント中、スタッフに協力しました。
Local schools cooperated to create a safer route for children.
地元の学校は、子どもたちのためにより安全な通学路を作る目的で協力しました。
cooperated の類義語・関連語
cooperated の語源・成り立ち Etymology
cooperated は cooperate の過去形で、co-「共に」+ operari「働く」から成る後期ラテン語 cooperari に由来する。関連語に operate, operation があり、「一緒に働く」がそのまま「協力した」という意味になっている。
Cooperated is the past tense and past participle of cooperate. Cooperate comes from Late Latin cooperari, meaning to work together, formed from co-, “together,” and operari, “to work.” The latter is related to Latin opus, meaning work, and also appears in the history of operate and operation. English adds the regular past-tense ending -d to cooperate. The word’s modern meaning closely preserves its original image of people working jointly.
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