put out fires中的fire为什么可以用复数

Can you put out fires? fire 这个英文单词是不可数的..为什么我的英语书上会出现put out fires ..这代表着什么?用法是什么?请 They put up tent by the fire..这里为什么用put up?不能用put out和put on 关于英语在英语中,有些句子如"He put out the fire."可以改为"He put the fire out 是put out fire 还是put out the fire? put a fire out和put out a fire区别 put out a fire 造句 the fire was put out可以改为the fire wasn't on put fireS HE out will连词成句 we put all the fires out,怎么翻译成中文 It can help people to put out fires是什么意思 Firemen put out fires and sometimes they r( ) people.