Chuyển các câu sau thành câu bị động

Chuyển các câu sau thành câu bị động
1)She teaches English at a Primary school
2)I clean the floor every day 
3)We learn English on Tuesday and Friday
4)Nam plays soccer every afternoon
5)I help my mom after school
6)Does he teach English in your school?
7)My brother drink milk every morning
8)My sister doesn't drink coffee
9)We read books everyday
10)Mr Tom drives his car to work
11)My grandmother often sells us stories
12)Do you play the piano
13)I don't drink milk for breakfast
14)She listens to music in the free time 
15)Lan washes the disher after meals
16)We brush our teeth twice a day
17)My sister practies English everyday
18)He rides his bike to school
19)Nam plays the badminton after school
20Our friend send me the postcards