floor怎么分詞？

第三人稱單數：floors；現在分詞：flooring；過去式：floored；過去分詞：floored。

例句：

There were papers lying around all over the floor.

地板上四處散亂著文件。

The floor of the car was covered in cigarette ends.

小轎車內底板上滿是煙蒂。

This floor has been designated a no-smoking area.

這樓層已定為無煙區。