One might wonder how they could possibly be good to their parents when they have passed away, for as soon as someone dies, we can no longer be in touch with them and they are gone for ever. According to Islam, even if our parents are dead, we can still do good to them by remembering them, visiting their graves, doing good deeds on their behalf and seeking God's forgiveness for them, in which case God will have mercy on them, grant them the rewards of good deeds done on their behalf and forgive them their sins Insha Allah. ;