Having taken into account the following- especially, italic and bold parted- would you possibly show me if we could omit to be always? in other word, could we write or say seem instead of seem to be ? or seem to be instead of seem?
Excerpted from Swan's book, Practical English Usage:
seem and seem to be
Seem is often followed by to be. We prefer seem to be when we are talking about objective facts - things that seem definitely to be true. Seem is used without to be when we are talking about subjective impressions. (The difference is not always clear-cut, and both are often possible.) Compare:
The bus seems to be full.
She seems excited.
The doctors have done the tests, and he definitely seems to be mentally ill.
It seems crazy, but I think I'm in love with the postman. (NOT It seems t8 he eM£y •.•)
According to the experts, the north side ofthe castle seems to be about 100 years older than the rest.
He seems older than he is. (NOT He seents ttJ he tJltler than he is - this would suggest that he might actually be older than he is.)
She doesn't seem to be ready yet. She seems (to be) very sleepy today.
Another link may be helpful: Page 42 the part B: enter link description here