His jpb is_(paint)the wall white.

问题描述:

His jpb is_(paint)the wall white.

to paint
be to do在此句中是他的工作是干什么的,用to强调。
be to do 的另一层意思是准备干什么,eg.he is to go to meet his girlfriend at the usual place.他要去见他的女朋友.

be+adj 所以要改成painting be doing的形式

to paint