If you don’t work hard, you may fail. 此句中fail意為“失敗;不及格,沒有通過考試”。fail還有其它用法。如:
① He never fails to write to his mother every week.
(fail意為“忘記、忽視或未能做某事”。)
② She has been failing in health.
(fail in意為“(健康狀況)衰退”。)
③ His friends failed him when he most needed them.
(fail意為“使失望, 辜負”。)
④ I had three passes and one fail.
(fail用作名詞,意為“考試不及格”。)
⑤ I’ll be there at two o’clock without fail.
(without fail意為“肯定,一定,必定”。)