Английский словарь американских идиом - lend a hand

or give a hand also bear a hand {v. phr.} To give help; make yourself useful; help. * /The stage manager asked some of the boys to lend a hand with the scenery./ * /Dick saw a woman with a flat tire and offered to give her a hand with it./ Compare: LIFT A FINGER. LEND AN EAR TO See: GIVE AN EAR TO.