They set up the tent(tents),making fire to keep warm and cook.楼上的都有错首先,一句话不用连词只能用一个动词,其余动作要用非谓语动词,因为同事进行,所以用ing表示伴随,and是to keep warm和to cook的连词,因为连词前用了to所以cook前面的to省略。也可以They set up the tent(tents),making a fire in order to keep warm and cook.In order to keep warm and cook,they make a fire while seting up the tent(tents)或者While seting up the tent(tents),They set up the tent(tents),making a fire to keep warm and cook.反正就是set up the tent(tents)、make a fire、cook(cook food)、keep warm(keep themselves warm)的组合,用连词或非谓语动词串起来