is supposed to have done 跟 was supposed to do 的有区别吗，

be supposed to do sth 与 be supposed to have done sth的区别~

1.be supposed to do= should do 应该做某事：
you are supposed to go to school on time=you should go to school on time.
你应该按时上学。
2.be supposed to have done sth= should have done. 应该做成了某事（实际上没做成）：
You are supposed to have done your homework= you should have done your homework.
你本应该能完成作业的。

有区别。

be supposed to be done表示应该被做成什么样， 或者该做没做

be supposed to have been done第二个就像你说的，表示某事该完成却没有完成，其中包含着不应该是现在这种状况的意思。 略带责备，和懊悔。

两者差异不仅在于感情色彩，还有时态。

这两个句子(Is supposed to have done/Was suppose to do) 有区别。

但你举的列子， 是正确的。 －－ TRAIN这个列子， 是一个意思。

Is supposed to have done: 是应该有去做完了。
was supposed to do: 是（过去式）应该做了。

have done；表达的是‘做完了’已经。 it is already COMPLETE， 因为是done.
to do； 表达的是做了（不一定完成）了。
－－ 当然； 常常， "do"也是等于要你“做完”的意思。 只是这个词， 在这样子的情况下， 有空可以让人钻。

列如：

Mom: Are you DONE with your homework? 你做完功课没？
Me: No, but I'm almost finished with it. 没， 但快了。

Mom: Did you DO your homework? 你做了功课没？
Me: I did it, I just didn't finish it. 做了， 就没做完而已。

但你给的列子里面， 这两个句子， 虽然句型不同， 但都是表达’过去发生了的事情'.

The train is supposed to have arrived an hour ago.
用的是：is ....ed to have ...ed 这样子的模式。

The train was supposed to arrive an hour ago.
用的是： was ....ed to ....

两个方法都是对的。 表达的意思一样。

列如： Johnny is hyped to have jumped over the fence. (第一个模式）。
列如： Joinny was hyped to jump over the fence. (第二个模式）。

不是，时态不一样

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