they were busy loading itloading it 在句子中做什么成分?
问题描述：
they were busy loading it
loading it 在句子中做什么成分?
答
做状语
答
做宾语
答
be busy (in) doing sth.忙于做某事
省略了in 的,所以doing sth的介词结构是作状语的.