I am wondering if the explanations correct and whether what is the difference between different "seems".
- He seems happy.
- He seems a happy fellow.
- He seems to be a happy fellow.
- He seems to work hard.
- He seemed to be happy
"Seem" also enters into an 'impersonal' construction which employs 1) the 'dummy' subject it + an active tensed form with "seem", followed by 2) a that clause (sometimes called a 'content' clause) which expresses the assertion which is hedged or qualified.
It seems that he is happy (but he may not be).
It seemed that he was a happy fellow (but he wasn't).
It will seem that he is working hard (but he will in fact be spending his time answering questions on ELL instead of working).
He is seemed to be something.