高一英语被动语态

高一英语被动语态内容摘要：

by 2020. 否定句 : Ten buildings hadn’t been built by them by 2020. 一般疑问句 : Had ten buildings been built by them by 2020? 练习： people speak English. made puters in the . used knives for cutting things. used metal for making machines. will produce silk in Suzhou and Hangzhou. are speaking English in class. 练习： people speak English. English is spoken by people. made puters in the . Computers were made in the by them. used knives for cutting things. Knives were used for cutting things by people. used metal for making machines. Metal was used for making machines by people. will produce silk in Suzhou and Hangzhou. Silk will be produced in Suzhou and Hangzhou by them. are speaking English in class . English is being spoken in class by them. have finished their homework. had learned three courses by the end of last year. said that they would plant more trees. boys were singing songs at 8:00 yesterday evening. have finished their homework. Their homework has been finished by them. had learned three courses by the end of last year. Three courses had been learned by me by the end of last year. said that they would plant more trees. They said that more trees would be planted by them. boys were singing songs at 8:00 yesterday evening. Songs were being sung by the boys at 8:00 yesterday evening. 六 .被动语态中的特殊情况 ，在变为被动语态时，仍然要。