room可以用作可数名词和不可数名词。
① room作“房间，室，寓所”解时，为可数名词。
It is a large room. 那是一个大房间。
The house has seven rooms. 这幢房子有七个房间。
There is a double room upstairs. 楼上有一个双人房间。
提示room可以构成多个复合词，如：classroom（教室），sitting-room（起居室），bathroom（洗澡间），dining-room（饭厅）等。
② room作“空间，余地，空位”解时，表示抽象意义，为不可数名词，可用much，a lot of修饰。
There's no room to move. 没有活动空间。
Is there room for me in the car？汽车里有我的座位吗？The furniture takes up too much room. 家具占的地方太大。
Can you make room for another person？你能为另一人留下地方吗？比较There's plenty of room. 有很多空地方。
There are plenty of rooms. 有很多房间。
③ 可表示具体意义和抽象意义的名词还有：hospital，church，school，market，table，prison等。
Church begins at two in the afternoon. 下午两点开始做礼拜。
We passed by the church in the afternoon. 我们下午路过教堂。
She has gone to market. 她去买东西了。
（=She has gone shopping.）I used to drive past the market. 我以前常开车经过那个市场。
There will be no school tomorrow. 明天不上课。
She left school in her teens. 她十几岁就辍学了。
He went to the school to see the principle. 他去那所学校见校长。