Passive voice
the windows / open by my mother
the windows were opened by my mother
the shoes / buy
the shoes were bought
the test / write
the test was written
the house / build
the house was built
the postcard / send
the postcard was sent
the songs / not / sing / by the singer
the songs weren't sung by the singer
the car / wash
the car was washed
these computers / sell / not
these computers weren't sold
dinner / serve
dinner was served
the people / inform / not
the people weren't informed
the shops / close / not
the shops weren't closed
the litter / throw away
the litter was thrown away
the cars / stop / not
the cars weren't stopped
the cat / feed
the cat was fed
the money / spend
the money was spent
the food / eat / not
the food was not eaten
the letter / send
the letter was sent
the tables / clean / not
the tables weren't cleaned
the table / set
the table was set
the trees / plant
the trees were planted
the documents / print
the documents weren't printed
the book / read / not
the book wasn't read
the lights / switch on
the lights were switched on
the children / pick up / not
the children weren't picked up
the beds / make
the beds were made