谁能帮我把下面的句子改为被动语态?
1.WespeakChinesehere.
2.Ifinishedmyhomeworkintwohours.
3.Theyweremakingamodelplane.
4.Theyhavefinishedthework.
5.Wecanchangewaterintoice.
6.Wemusttakedownthenoticequickly.
7.Whenwillyoupaintthewall?
8.Haveyoufoundyourbook?
9.Wehaveneverheardofsuchthingsbefore.
10.Apeasantwomanbroughtthechildup.