结构2：名词或代词(主格) + doing1)My mother cooking in the kitchen, I was doing my homework in my room. （表伴随）我妈妈正在厨房做饭，我在房间里做作业。
61 D Para1 L8-962 C Para2 L263 D Para3 L464 B Para1 L6-765 B66-70 ADBCE
