dig的過去式和過去分詞和現在分詞

　　They dug in their heels and would not lower the price.

　　他們說什么也不肯降價。

　　I dug around in my bag for a pen.

　　我在包里到處翻找筆。

　　We dug a deep pit in the yard.

　　我們在院子中挖了個深洞。

　　The enemy must be digging themselves in now ready for the attack

　　敵人現在一定在挖掩體，準備迎接進攻。

　　I think I'll do some digging in the garden.

　　我想我該給花園松松土了。