單詞解析：
1、用法：
n. (名詞)
sheep用于比喻可表示人“膽小”。
2、常用短語：
用作名詞 (n.)
1）a wolf in sheep's clothing
披著羊皮的狼 sb who appears to be harmless but is in fact dangerous
2）black sheep
害群之馬，敗類，不肖之子 sb who does not conform to the family's wishes
3）count sheep
心里計數(shù)以求入睡 keep counting to oneself in an attempt to fall asleep
3、詞匯搭配：
動詞+～
1）breed sheep 繁殖羊
2）buy sheep 買羊
3）drive sheep 趕羊
形容詞+～
1）female sheep 母羊
2）male sheep 公羊
3）young sheep 小羊，羊羔