问题描述: difficult to fly还是difficulty to fly.fly不是动词么 副词修饰,为什么答案是形容词 1个回答 分类:英语 2014-10-03 问题解答: 我来补答 完整句子呢? 再问: It‘s old-aged and heavy wings,due to their thick,become stuck to its' chest and make it ___ to fly. 再答: difficulty是名词,difficult是用来形容it,使它变得难以飞行。to在这里是表示达到某种状态。。 展开全文阅读