初三英语把下面句子改为被动语态We didn't plant trees last year

将下列句子改为被动语态.1.We must plant more trees this year.2.Can they We plant many trees in spring every year （改为被动语态） we are going to plant more trees next year改为被动语态. We plant trees around our school every year改为被动语态 People plant hundreds of trees every year 改为被动语态 英语被动语态转换快1)We should plant trees in spring.(改为被动语态）Trees in 改为被动语态：We plant trees every spring. 将下列句子改为被动语态 we will plant some trees in front of the river. we will plant many trees next year (变被动语态）many trees ( )( )( 初三英语改被动语态1.They planted more trees last month.2.We often see We plant trees every year to protect our environment 改成被动语态 We should plant more trees this year.怎么变被动语态?