walk

　　I walked to school this morning because my bike was broken. (walk用作动词,意思为“步行”,是教材中的第一种用法。)

　　The Browns enjoy walking by the lake after supper. (walk用作动词,意思为“散步”,是教材中的第二种用法。)

　　walk除了以上的常见用法外,还有下列几种用法。

　　My grandfather always walks his dog in the morning. (walk用作动词,意思为“牵着动物走,溜”。)

　　My boyfriend walked me home last evening. (walk用作动词,意思为“陪伴……走,护送……走”。)

　　My father has friends from all walks of life. (walk用作名词,a walk of life为固定短语,意思为“行业,阶层”。)

　　sound

　　When they were talking in the room, the bell sounded.

　　When I saw the smoke, I tried to sound the alarm.

　　My father is a person of sound judgment.

　　The baby is sound asleep now.

　　sound在教材中的第一个意思为“听起来”,作动词用;第二个意思为“声音”,作名词用。在上面的四个句子中,前两个sound作动词用,意思分别为“(使)发出声音,响”和“鸣警报”;第三个sound作形容词用,意思为“明智的”;第四个sound作副词用,意思为“酣,沉”。