He plants flowers every year.
--> Flowers are planted by him every year.
We speak Chinese.
--> Chinese is spoken by us.
I look after the old man.
--> The old man is looked after by me.
Do you clean your room every day?
--> Is your room cleaned by you every day?
Tom doesn’t wash his shoes every week.
--> Tom's shoes aren't washed by him every week.
I wrote a letter yesterday.
--> A letter was written by me yesterday.
Mary made 3 kites the other day.
--> 3 kites were made by Mary the other day.
Did they build this bridge last year?
--> Was this bridge built by them last year?
They asked us to sing a song.
--> We were asked to sing a song by them.
They didn’t water the flowers.
--> The flowers weren't watered by them.
We must obey the school rules.
--> The school rules must be obeyed by us.
Should I open the door?
--> Should the door be opened by me?
Wu must plant trees every year.
--> Trees must be planted by us every year.
Tom shouldn’t drink cold water.
--> Cold water shouldn't be drunk by Tom.
We can’t see stars in the day time.
--> Stars can't be seen by us in the day time.
Mary will sweep the floor.
--> The floor will be swept by Mary.
Will Tom clean his room?
--> Will Tom's room be cleaned by him?
I won’t believe his story.
--> His story won't be believed by me.
People won’t use paper money in 100 years.
--> Paper money won't be used by people in 100 years.
Mary is going to wash the dishes.
--> The dishes are going to be washed by Mary.
Tom has cleaned his room.
--> Tom's room has been cleaned by him.
They have planted a lot of trees since 1990.
--> A lot of trees have been planted by them since 1990.
Mary hasn’t cleaned her room.
--> Mary's room hasn't been cleaned by her.
Have you finished your homework?
--> Has your homework been finished by you?
How many books have you sold out so far?
--> How many books have been sold out by you so far?
A friend is playing the piano.
--> The piano is being played by a freind.
They are reading some old books.
--> Some old books are being read by them.
Are you using your knife?
--> Is your knife being used by you?
Tom is not reading a book.
--> A book is not being read by Tom.
Is Mary serving you now?
--> Are you being served by Mary now?
I was mending the bike when Tom came in.
--> The bike was being mended by me when Tom came in.
They were handing out the exercise books when the teacher came in .
--> The exercise books were being handed out by them when the teacher came in.
He gave me a book yesterday.
--> A book was given to me by him yesterday
或
--> I was given a book by him yesterday.
His mother bought him a new coat.
--> He was bought a new coat by his mother.
或
--> A new coat was bought for him by his mother.
They heard her sing a song at the party.
-> She was heard to sing a song at the party.
I found him playing in the park.
--> He was found playing in the park（ by me）.
The teacher made Tom stand for a long time.
--> Tom was made to stand for a long time by the teacher.
We can take good care of your cat.
--> Your cat can be taken good care of by us.