(idiom, from the Analects) (usu. of a passer-by who comes across a critical situation) to step in and help; to take brave or selfless action
to see; to meet; to appear (to be sth); to interview; opinion; view
as (in the capacity of); to take sth as; to act as; to serve as; to behave as; to become; to be; to do; by (in the passive voice)
Practice each character