1、Recueoperationsareprovingdifficult.difficult不是来形容名词的么bedoing是名词?2、Thoughtheyarerunningoutoffoodanddrink.已经用完了为什么还要用bedoing不应该用havedone

Question

1、Recue operations are proving difficult.
difficult不是来形容名词的么 be doing 是名词?
2、Though they are running out of food and drink.
已经用完了 为什么还要用be doing 不应该用have done

Answer 1

1. 主语是resccue operations are proving 是谓语动词,系动词, difficult 形容词作表语
2. 这句意思是,尽管他们快要用完水和食物了 be doing 这里是就要,快要的意思