Herd：放牧
Stay alert：保持警惕
Instead: 相反
Flock：羊群
watch：看管
Sheepfold：羊圈
Howl：嚎叫
Regret：後悔
Make up：彌補
Once there was a shepherd. One day, he herded sheep in mountains as usual.
When he saw a wolf following his sheep far behind, he began to stayalert. However, after a few months, the wolf didn’t hurt any sheep at all.Instead, other wild animals didn’t dare to walk close to the flock becauseof the wolf. Seeing this, the shepherd thought: It seems that the wolf is not as cruel and tricky as people said. If I can get the wolf to watch mysheep, other wild animals will not hurt my sheep any more. Then he tookthat wolf into the sheepfold.
One day, the shepherd had something to deal with in the town. Beforeleaving home, he told the wolf to take good care of the sheep. Thewolf agreed happily. But soon after he left the sheepfold, the wolfhowled and called out many wolves here. All the sheep wereeaten by the wolves.
When the shepherd came back, he found that all his sheep were gone. Hewas so regret. But he could do nothing to make up.
成語典故
從前，有個牧羊人在山谷裡放羊，他遠遠地看見一隻狼總是跟在羊群後面，就提高了警惕。但是，一連幾個月過去了，那隻狼並沒有傷害到羊群，反而因為有狼的存在，其他的野獸都不敢靠近羊群了。
看到這種情況，牧羊人心想：「看來狼並不像別人說的那麼狠毒和詭計多端，如果能讓狼來幫我看管我的羊，不就不用擔心其他野獸傷害到它們了嗎？」這樣想著，牧羊人就把這隻狼帶進了羊圈。
有一天，牧羊人要進城辦事，就吩咐狼照顧家裡的羊，狼開心地答應了。沒想到他剛剛離開羊圈，狼就尖叫著呼喚來了狼群，把牧羊人的羊全都拖走吃掉了。
牧羊人回到家後，看到自己的羊全都不見了，悔恨得捶頭頓足，卻也於事無補了。