When should we plant the trees They (〉in spring.

When should we plant the trees They (〉in spring. We should plant a lot of trees in the mountain.They can_____ We should plant trees in spring.改成被动语态怎样改? 英语被动语态转换快1)We should plant trees in spring.(改为被动语态）Trees in 改被动语态 '1.We plant trees every spring.2.They took the boy to We can______ (plant)trees eigher in spring or in the winter 划线提问：1Jim and Tom plant trees in spring 2We paly in the snow They (plant trees) in spring.对划线部分提问 they plant trees in spring的被动语态 We must plant trees in spring改为被动时态 You may answer the quest we often plant trees in spring怎么变被动语态 "We can plant trees in spring."对"plant trees"提问,怎么提?