All I wanted to do was sleeping.这里加was做什么?

问题描述:

All I wanted to do was sleeping.这里加was做什么?

was作谓语all作主语I wanted to do作all的定语sleeping作宾语

All I wanted to do是一个从句clause

All I wanted to do 作主语
was sleeping 谓语 构成过去进行时
主谓结构

谓语动词,前面整个短语作为主语。