roof的複數形式怎麼寫

例句：

The house needs attention but the roof is sound.

房子需要修葺，不過屋頂還完好無損。

We could see the stars through an opening in the roof.

我們從屋頂的小洞能看見星星。

I don't want her under my roof again.

我再也不想讓她到我家來了。

There are various stores and restaurants all under one roof.

在同一棟大樓裏有各種商店和飯館。

I'll have to see about getting that roof repaired.

我得找人把房頂修一修。