She stayed up reading until midnight.stay up 不是不加宾语吗?

stay up 熬夜,不睡觉. you shouldn't stay up to finish the work.你不应该为了完成工作而去熬夜.这句话表示目的,to do 形式并不是stay up的宾语,它是目的状语； he stayed up last night,working.这里的d...