roof属于可数名词，可以用数量来计算，roof的复数形式是roofs。
扩展资料
例句：
The house needs attention but the roof is sound.
房子需要修葺，不过屋顶还完好无损。
We could see the stars through an opening in the roof.
我们从屋顶的小洞能看见星星。
I dont want her under my roof again.
我再也不想让她到我家来了。
There are various stores and restaurants all under one roof.
在同一栋大楼里有各种商店和饭馆。
Ill have to see about getting that roof repaired.
我得找人把房顶修一修。
