我们经常听到那个女孩晚上在她的房间唱歌。（变为被动语态） The girl is often heard to sing in her room in the evcning.那个女孩晚上经常被听到在她的房间唱歌。 一、 动词的时态
1. have/has been to,have/has gone to和have/has been in 三种结构的区别
Jim has gone to London with his family. 吉姆已和他的家人去了伦敦。 Have you been to Beijing before？ 你以前去过北京吗？
The greens have been in chine for two years. 格林一家已在中国两年了。