have的過去式是什么

　　例句：

　　They had had their pet dog stuffed.

　　他們請人把他們的寵物狗制成了標本。

　　She had repented of what she had done.

　　她對自己所做的事深感懊悔。

　　Everything had gone.

　　一切都過去了。

　　The car had had it.

　　這輛車無法修復了。