为你解答.
1、People speak English in many countries.
English is spoken by people in many countries.
2、I have invited you to a lunch party.
You have been invited to a lunch party by me.
3、You Must nottakethese magazines out of the room.
These magazines mustn't be taken out of the room.
4、They are repairing the car in the garage.
The car is being repaired by them in the garage.
5、They have found ways to make waste water clean.
Ways to make waste water clean have been found by them.