disappoint/disappointed/disappointing

disappoint /ˌdisəˈpɔint/ vt. 使失望：be completely/utterly disappointed in sb. (sth.) 对某人(某事)感到彻底失望；be disappointed about the weather 对天气感到失望；be quite disappointed with one’s secretary 对自己的秘书感到失望  John was disappointed at not finding Mary at home. 约翰发现玛丽不在家感到失望。You disappointed us by not coming to our party. 你不来参加我们的聚会使我们失望。

disappointed /disəˈpɔintid/ adj. 失望的（作表语后可跟介词短语、不定式、从句，也可单用）： She had a disappointed look.她带有失望的神色。I was disappointed at (hearing) the news.那消息使我感到失望。I’m disappointed in you (your work). 我对你(你的工作)感到失望。She was disappointed not to find me at home. 发现我不在家,她很失望。He was disappointed that the guests were not coming. 客人们不来了，他很感失望。［考句］ Tony is very disappointed with the results of the exam.托尼对考试的结果很失望。

disappointing adj.令人失望的：The result was disappointing.结果是令人失望的。