求以下动词的过去式和过去分词 过去式 过去分词be was\\were beengo went gonecome came comehear heard heardsee saw seeneat ate eaten find found foundbuy buoght boughtbring brought broughttake took takenmake made madesing sang sungring.
sing-sang-sung.sing的过去式是sang，过去分词是sung.
sing的过去分词 sing过去分词sung你的采纳我的动力很高兴能够帮助你
