+0

We can put "The concert was to start at 8 p.m., but it was delayed (it started at 8.30)", can't we? Is it possible to say 'The concert was to have started at 8 p.m, but the singer failed to come. (There was no concert at all).

Comments  

It is not incorrect, however there are much better and less awkward ways of saying that. I am not native, but usually most people phrase it like this:

First sentence- The concert at 8 p.m was delayed for half an hour.

Second sentence- The concert should have started at 8, but the singer could not come.

Mister J. ,thank you very much.