Passive voice + PRESENT
The windows / ought to / open by my mother
The windows ought to be opened by my mother.
The shoes / buy.
The shoes were bought.
The test / should / tell.
The test shouldn't be told.
He cooked dinner in my house last night.
Dinner was cooked last night.
The postman delivers the letter.
The letter is delivered by the postman.
The song / has to / sing / by the original singer.
The song has to be sung by the original singer.
the car / wash.
The car was washed.
These computers / sell.
These computers aren't sold.
Dinner/ couldn't / serve.
Dinner couldn't be served.
They took the books to the library.
The books were taken to the library.
The shops/ must / close.
The shops must be closed.
I must threw away the garbage yesterday.
The garbage must be thrown away.
I drive the car to my house every day.
The car is driven every day.
The parents didn't pick up the children.
The children weren't picked up by their parents.
She must have invited her friend.
Her friend must have been invited.
The food / eat.
The food is eaten.
The letter / send.
The letter was sent.
The tables / clean.
The tables aren't cleaned.
We should have informed the police.
The police should have been informed.
PRESENT:
They should water the plants once a day.
The plants should be watered once a day.
The secretary prints the documents.
The documents are printed by the secretary.
He / should / not / slept / in class.
He shouldn't be slept in class.
They don't turn off the lights when they leave.
The lights aren't turned off when they leave.
The architect should have built the house last year.
The house should have been built last year.
Question in the past:
Did the teacher give the marks?
Were the marks given by the teacher?