about seem
seem + adj
seem to be adj
He seems happy.( correct)
That story seems to be true. (correct)
Then,
He seems to be happy. ( not correct)
That story seems true. ( correct or not)
so, the point is what's the difference between seem + adj and seem to be + adj?
Does it have something to do with the subjects (people or things)?

Question

about seem
seem + adj 
seem to be adj
He seems happy.( correct)
That story seems to be true. (correct)
Then,
He seems to be happy. ( not correct)
That story seems true. ( correct or not)
so, the point is what's the difference between seem + adj and seem to be + adj?
Does it have something to do with the subjects (people or things)?

Answer

It seems that you must have some context that is not included.
.
He seems happy.( correct)
That story seems to be true. (correct)

He seems to be happy. ( CORRECT)
That story seems true. ( CORRECT)
.
I seem to have answered the question.
Next, you should seem happy.
Does he seem happy, now?

Ne manquez pas cette occasion d'apprendre une langue depuis chez vous. Découvrez notre sélection de professeurs de langues expérimentés et inscrivez-vous dès maintenant à votre premier cours !