把下列短语改为分词短语

when crossing the street
when hearing the news
as being still rather weak
when being introduced to each other
being mixed with snow
while walking in the street
being supportes by his little grandson
which being covered with white snow
which being covered with entrance to the cave
and being disciosed who stole the money

hear sth.
be introduced to
mix sth.with .sth.
be supported by
be covered with sth
disciose sb.do

when crossing the street
when hearing the news
as she being weak
when they being introduced……
mixed with snow
wakling in the street
supported by his……
covered with white snow
covering with entrance……
disciosing who stole the money