关于非谓语动词语法问题
the programme was so exciting that the children kept their eyes(fixed ) on the television screen.
和
when they broke open the door,they found the child(lying)on the floor unconcious.
这二句为什么会用不同的,（个人认为是一种持续的状态,第一句因为是过去的?第二句是不是因为从BROKE OPEN THE DOOR之前,这个动作就存在的哦?）
have you ever heard a pop song(sung)japaese.
如何判断哦,有什么规则吗/
(not wishing) to continue his studies,james quitted school.
我选HAVING NOT WISHED(我觉得先不想,然后再QUITTED的呀.）
是因为这个NOT WISHING 和QUITTED会同时结束吗?所以用一般式,
wang knew how to operate the machine,(having been) a worker for many years.
和BEING这二个搞不清呢,如果改成BEING行不的哦?搞不清楚这二个呢.是因为FOR MANY YEARS