to be so
Tom no podía creer que María pudiera ser tan tonta.
Tom couldn't believe that María could be so stupid.
Me gustaría ser tan rico como él.
I’d like to be as rich as he is.
¿Cómo has podido ser tan irresponsable?
How could you be so irresponsible?
Tom no parecía ser tan talentoso como Mary.
Tom didn't seem to be as talented as Mary.