单词解析：
1、用法：
n. (名词)
sheep用于比喻可表示人“胆小”。
2、常用短语：
用作名词 (n.)
1）a wolf in sheep's clothing
披着羊皮的狼 sb who appears to be harmless but is in fact dangerous
2）black sheep
害群之马，败类，不肖之子 sb who does not conform to the family's wishes
3）count sheep
心里计数以求入睡 keep counting to oneself in an attempt to fall asleep
3、词汇搭配：
动词+～
1）breed sheep 繁殖羊
2）buy sheep 买羊
3）drive sheep 赶羊
形容词+～
1）female sheep 母羊
2）male sheep 公羊
3）young sheep 小羊，羊羔