Again, 'I have' shows possession or something acquired. By adding a past participle you are informing someone of a past or completed action done by you.
我們又看到了I have,，這里也是表達(dá)擁有或者獲得了什么。但是后邊加一個(gè)過(guò)去分詞,，你就可以告訴別人你過(guò)去所完成的某個(gè)動(dòng)作,。

Here are some examples:

"I have done it."我已經(jīng)完成了。
"I have heard that before."
"I have driven a car."我開(kāi)過(guò)車,。
"I have forgotten the words."
"I have read that book."
"I have eaten at that restaurant before."我在那個(gè)酒店吃過(guò)飯,。
"I have flown in an airplane."我坐過(guò)飛機(jī),。
"I have forgiven you."我已經(jīng)原諒你了。
"I have seen you before."我以前見(jiàn)過(guò)你,。
"I have written a letter."