had been away和had left这两句有什么区别吗

had been away和had left这两句有什么区别吗 have been 和had been 什么区别 had gone和had been 有什么区别? had done 和 had been done有什么区别啊? had been和have been有什么区别?请举例 has been和had been 有什么区别? had left=had been away from.为什么要加from? was doing、had been doing和had been done都有什么区别? had been 和 Having been 区别? had been invited 和were invited有什么区别? had been doing 和had been done有什么差别 had been doing 和had been done有什么差别?