помогите найти 2 и 3 форму глаголов discover, sail, be interested in, appear, prepare, smoke, depend on,fight, sell.

discovered-discovered
sailed-sailed
was/were-been
interested in-interested in
appeared-appeared
prepared-prepared
smoked-smoked
depended on- depended on
fought-fought
sold-sold

надеюсь, это то что надо