yesterday he stayed up all night____ doing his homework

yesterday he stayed up all night____ doing his homework He was doing his homework yesterday afternoon 改为否定陈述句 he was doing his homework yesterday afernoon改为否定 Tom () his homework yesterday,because he was in hospital all he is()doing his homework He is doing his homework He was doing his homework when his father came yesterday 这里的 He was doing his homework when his father came yesterday 可不可 Joe stayed up late to finish his homework.(同义句)Joe stayed up He was doing hie homework when his father came yesterday was He was doing his homework yesterday afternoon改为否定陈述句急 改被动语态He was doing his homework at this time yesterday .