have的過去式和過去分詞是什么

　　We had walked further than I had realized.

　　在我不知不覺中我們已走得很遠。

　　He had heard that the trophy had been sold.

　　他聽說那個獎杯已經被賣掉了。

　　We've had words.

　　我們吵過架。