——关于过去分词1.Unless__invited____tospeak,youshouldremainsilentattheconference.为什么用invited而不用.beinginvited?2.Beingtired,ididnotgotowork.为什么用Beingtired而不用tired?3.Iwenthome,tired.为什么用tire

　　——关于过去分词

　　1.Unless__invited____tospeak,youshouldremainsilentattheconference.

　　为什么用invited而不用.beinginvited?

　　2.Beingtired,ididnotgotowork.

　　为什么用Beingtired而不用tired?

　　3.Iwenthome,tired.

　　为什么用tired而不用beingtired.

　　请解释什么情况下用invited什么情况下用beinginvited以及tired,beingtired.

　　并且说明他们各自是怎么变化而来的.