把以下英语句子改成被动语态.1:he usually files kites2:he gave me a gift ye
把以下英语句子改成被动语态.
1:he usually files kites
2:he gave me a gift yesterday
3:i saw mr wang walk into the classroom just now
4:what did you do yesterday
5:when did you bring tea to korea
6:does he often write letters?
7:do you use chopstick to eat