Chuyển câu từ hiện tại hoàn thành sang quá khứ đơn và ngược lại: Nam hasn't seen Mary since 2005. It's nearly twenty years since ny father saw my uncle. We last saw our granfather two years ago. We hasn't been back to his home for ten years

1.Chuyển đổi từ hiện tại hoành thành sang quá khứ đơn (và ngược lại):
a.Nam hasn't seen Mary since 2005
->The last time Nam...........................................
b,It's nearly twenty years since ny father saw my uncle.
->My father hasn't ..............................................
c,We last saw our granfather two years ago
->We haven't......................................................
d,We hasn't been back to his home for ten years.
->It's ten years...................................................
2.Thể bị động:
a,thì hiện tại đơn:
+My mother makes some cakes for my family
->...............................................................
+These young people always wear ieans 
->..............................................................
+We ask visitors not to smoke in this area 
->..............................................................
+People spend a lot of money on advertising everyday
->..............................................................
+She usually decorates the room at weekends.
->..............................................................
3.thì quá khứ đơn:
+she gave us more information
->...............................................................
+her teacher taught her how to apply this theory.
->................................................................ 
*ghi nho:giải dum hết lun thanks nhiều