Question

$change \: into \: passive \: voice \:$
(1) When have you invited your friends?
(2) you may spoil your only son.
(3) Did you paint that door?
(4) Go and sit there.
(5) who was preparing food.
(6)When has someone discovered the cure of covid-19?
(7)I know this boy.
(8)Don't blow door bell?
(9)What is he writing?
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Answer 1

•|| Answer ||•

(1) When have you invited your friends?

➡When your friends have been invited by you?

(2) You may spoil your only son.

➡Your only son may be spoiled by you.

(3) Did you paint that door?

➡Was the door painted by you?

(5) who was preparing food.

➡By whom the food was being preapred?

(6)When has someone discovered the cure of covid-19?

➡When has been the cure of civud-19 discovered by whom?

(7)I know this boy.

➡The boy is known by me.

(8)Don't you rung door bell?

➡Isn't the door bell rung by you?

(9)What is he writing?

➡What is being written by him?

Hope it helps you...