all the morning the lady walked around the shops,(keeping)an eyes for bargains.为什么用ing?

问题描述:

all the morning the lady walked around the shops,(keeping)an eyes for bargains.为什么用ing?

伴随状语,此句的谓语动词是walked,而一句话不能有两个谓语.所以后面的是状语.ing形式表伴随:同时做两件事.