用被动语态by造句1. 我们讲英语 2.他每周写封信给他父母 3.每年他们都会用南瓜做灯笼 4.他们在这个店买花 5.我

1.English is spoken by us.
2.The letters that his parents received are written by him.
3.Pumpkins are made into lanterns by them every year.
4.The fiowers are bought in this shop by them.
5.some fruit trees are planted in the mountain by us in every spring.