hear sb do和hear sb doing的区别 Do you often hear John____in his room?-yes.Listen!Now wo can hear him____in his room. A sing;to sing B singing;singing C sing;singing D to sing;singing
Do you often hear John____in his room?-yes.Listen!Now wo can hear him____in his room. A sing;to sing B singing;singing C sing;singing D to sing;singing 选C sing;singing .hear sb.do sth.表示听见某人做...