stay的过去式和过去分词和现在分词是什么

　　We went on to Paris and stayed there eleven days.

　　我们接着去了巴黎，在那里停留了十一天。

　　Like I said, you're always welcome to stay.

　　正如我以前所说的一样，我永远都欢迎你留下来。

　　I'll stay around in case you need me.

　　我就待在这儿，也许你用得着我。

　　Much as I would like to stay, I really must go home.

　　尽管我想留下来，但我确实必须回家。

　　They're welcome to stay here as long as they like.

　　他们在这里愿意住多久就住多久。