What is the difference between "muss gut gewesen sein" and "musste gut sein"? For example, I was told
Das Konzert muss wirklich gut gewesen sein.
I have three questions:
- What is this tense of sentence called? "gewesen sein" sounds like passive but I didn't find any similar Passive examples, so I'm wrong on that.
- Does it mean "The concert must have been good"?
- If I say "Das Konzert musste wirklich gut sein", Doesn't that mean that the concert had to be good? (Präteritum?) . Is this like asking the difference between "It had to be good" and "It must have been good"?