In English, I might say something like "You must be sad" to someone whose friend had died, which means something more like "I assume you are sad", rather than "You have to be sad".
Does the same work in German? Could I say "Du musst traurig sein"?
In English, I might say something like "You must be sad" to someone whose friend had died, which means something more like "I assume you are sad", rather than "You have to be sad".
Does the same work in German? Could I say "Du musst traurig sein"?
Yes, it works. You can weaken the sentence a little, if you use Konjuktiv II. Here are some more examples:
Der Motor ist noch heiß, sie muss gerade angekommen sein. (100% certainty)
Du hast im Lotto gewonnen, du musst jetzt sehr glücklich sein. (100% certainty)
Es ist schon zwei Uhr, er müsste gleich kommen. (90% certainty)