1.- They built a house.
-A house was built.

2.- Our uncle takes Susan to hospital.
-Susan is taken to hospital by our uncle. 

3.- We have cleaned the car.
-The car have been cleaned.

4.- They speak English.
-English is spoken.

5.- The policeman help the children.
-The children are helped by the policeman.

6.- A robber broke the window of the shop.
-The window of the shop is broken by a robber.

7.- My mother sends me to the butcher.
-I am send to the butcher by my mother. 

8.- Peter will look after my little brother.
-My little brother will be looked after by Peter.

9.- Mr. Jones watches the film.
-The film is watched by Mr. Jones.

10.- Somebody built the house last year.
-The house was built last year by Somebody

11.- They speak English in the shop.
-English is spoken in the shop.

12.- The waiter brought me a big steak.
-A big steak was brought me by the waiter.

13.- She gave me the box.
-The box was given me.

14.- Max will look after him.
-He will be looked before by Max.

15.- We saw her in Dresden last week.
-She was seen in Dresden last week.

16.-No one has ever beaten me at chess.
-I haven't been beaten at chess.