英语被动语态转换快1)We should plant trees in spring.(改为被动语态）Trees in

1)We should plant trees in spring.(改为被动语态）
Trees should be planted in spring
2)We should allow teenagers to choose their own clothes(改为被动语态的否定句）
Teenagers should be allowed to choose their own clothes.
3)The flowers must be watered three times a week.(改为主动语态）
We should water the flowers three times a week.
4)His homework should be handed in before school is over(改为一般疑问句）
Should his homework be handed before school is over?

1)We should plant trees in spring.(改为被动语态）
Trees should be planted in spring
2)We should allow teenagers to choose their own clothes(改为被动语态的否定句）
Teenagers should be allowed ...

1.Trees should be planted in spring.
2.Teenagers shouldn't be allowed to choose their own clothes.
3.We water the flowers three times a week.
4.Should his homework be handed in before school is over?