将下列句子改为被动语态.1.We must plant more trees this year.2.Can they

将下列句子改为被动语态.1.We must plant more trees this year.2.Can they 将下列句子改为被动语态：they will plant trees on the hill n 将下列句子改为被动语态 we will plant some trees in front of the river. we are going to plant more trees next year改为被动语态. We should plant more trees this year.怎么变被动语态? 将下列主动语态变成被动语态:Can we plant trees here? 将下列句子变成被动语态 1.People usually plant trees in spring.2.You sho We plant many trees in spring every year （改为被动语态） We plant trees around our school every year改为被动语态 改被动语态 '1.We plant trees every spring.2.They took the boy to People plant hundreds of trees every year 改为被动语态 将下列句子改为被动语态:1.They will turn this terrible place into a beau