i'm supposed to be running和i am supposed to run的区别?

例句如下:I am supposed to be slimming.这里的be supposed to 他为什么用了be be supposed to 和should的区别 I'M EXCTLY WHERE I'M SUPPOSED TO BE now 翻译：i may not be what i m supposed to be supposed to be done 和be supposed to have been done的区别 what am i supposed to do 歌词 英文歌中what am I supposed to where am i supposed to change ought to 和be supposed to 的区别和用法 英语翻译How am I supposed to live?How am I supposed to withstand I supposed to.I wonder. should 和 be supposed to 的区别与用法?