fail

　　If you don’t work hard, you may fail. 此句中fail意为“失败;不及格,没有通过考试”。fail还有其它用法。如:

　　① He never fails to write to his mother every week.

　　(fail意为“忘记、忽视或未能做某事”。)

　　② She has been failing in health.

　　(fail in意为“(健康状况)衰退”。)

　　③ His friends failed him when he most needed them.

　　(fail意为“使失望, 辜负”。)

　　④ I had three passes and one fail.

　　(fail用作名词,意为“考试不及格”。)

　　⑤ I’ll be there at two o’clock without fail.

　　(without fail意为“肯定,一定,必定”。)

　　lead

　　lead在教材中有两种用法:用作动词时意思为“引导,引诱”;用作形容词时意思为“领导的,领先的,带领的”。

　　除了教材中的用法外,lead还有以下几种用法。

　　Which road leads to the mountain? (lead用作动词,意思为“通向,通往”。)

　　My grandmother is leading a quiet life in the countryside. (lead用作动词,意思为“过某种生活”。)

　　Not having a balanced diet can lead to health problems. (lead用作动词,意思为“导致”。)

　　Her brother took the lead in the high jump. (lead用作名词,意思为“领先地位”。)

　　In this new film, she is the lead. (lead用作名词,意思为“主角”。)