____ (feel) cold,they made a fire____(warm) themselves up
问题描述：
____ (feel) cold,they made a fire____(warm) themselves up
答
feeling这里是现在分词作状语表原因,因为和主语构成主动关系所以用现在分词.
to warm这里动词不定式作目的状语,意思是为了暖和他们自己.