Mary heard someone sing songs in the next room when she got home.这句话有错误的地方吗
问题描述：
Mary heard someone sing songs in the next room when she got home.这句话有错误的地方吗
答
somebody singing songs
答
sing 应该改成 singing
hear +doing
答
有,heard someone singing应该是
因为是听到有个人在唱歌