——关于过去分词

——关于过去分词
1.Unless__invited____ to speak,you should remain silent at the conference.
为什么用invited而不用.being invited?
2.Being tired,i did not go to work.
为什么用Being tired而不用tired?
3.I went home,tired.
为什么用tired而不用being tired.
请解释什么情况下用invited什么情况下用being invited以及tired,being tired.
并且说明他们各自是怎么变化而来的.