song的过去式和过去分词和现在分词

　　A voice suddenly sang out above the rest.

　　在一片嘈杂声中突然传出一个人的声音。

　　As she sang she strummed on a guitar.

　　她边唱边弹吉他。

　　It surprises me that you've never sung professionally.

　　想不到你从来没搞过专业演唱。

　　Josef Krips at the State Opera hired her in spite of the fact that she had never sung on stage

　　尽管她从未在舞台上演唱过，国家歌剧院的约瑟夫·克里普斯还是聘用了她。

　　Birds were already singing in the garden.

　　小鸟已经在花园里歌唱了。

　　She has a good singing voice.

　　她有一副很好的歌喉。