seem

seem + adjective
You seem nervous.

seem + to be + adjective
You seem to be nervous.

seem + noun
He seems a smart guy.

seem + to be + noun
He seems to be a smart guy.

seem + like + noun
He seems like a smart guy.

seem + to + base form
He seems to know what he’s doing.

it seems that + clause
It seems that he knows what he’s doing.