It has fuelled worries about whether the euro bloc could suffer deflation,potentially de-railing economic growth.
问题描述：
It has fuelled worries about whether the euro bloc could suffer deflation,potentially de-railing economic growth.
has fuelled与worries about是什么关系,为什么时态不一样,还有,它们的主语是什么?de-railing是什么意思?
答
has fuelled是谓语动词,名词worries是fuel /has fuelled的宾语,二者是谓语和宾语的关系；about是介词,连接后面的宾语从句修饰worries.
主语是It,应该是指代这个句子之前的某件事物.
de-railing是动词de-rail的现在分词形式,做伴随状语.
原句意思是：它已经加剧了关于欧盟能否承受通货紧缩的（潜在地 / 伴随与经济发展脱轨的）忧虑.