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??1.?????????????is / am / are + ?????????

??Our classroom is cleaned everyday.

??I am asked to study hard.

??Knives are used for cutting things.

??2.?????????????was / were + ?????????

??A new shop was built last year.

??Dinosaur eggs were laid long long ago.

??3.?????????????has / have + been + ?????????

??This book has been translated into many languages.

??Many man-made satellites have been sent up into space by many countries.

??4.?????????????will+ be + ?????????

??A new hospital will be built in our city.

??Many more trees will be planted next year.

??5.??????????????????+ be + ?????????

??Young trees must be watered often.

??Your mistakes should be corrected right now.

??The door may be locked inside.

??Your homework can be handed in tomorrow.

??6.?????????????am / is / are + being + ?????????

??Uncle Wang is mending my bike now.?

??My bike is being repaired by Tom now.

??They are planting trees over there. ?

??Trees are being planted over there by them.

??7.?????????to + be + ?????????

??There are two books to be read. ?

??There are twenty more trees to be planted.

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?????????????????????????????

??1.????????

??2.????????????

??3.??????????????

??4.?????????????

????1.?Bruce writes a letter every week. ?A letter is written by Bruce every week.

??2.?Li Lei mended the broken bike this morning.?The broken bike was mended by Li Lei this morning.

??3.He has written two novels so far.?Two novels have been written by him so far.

??4.They will plant ten trees tomorrow.?Ten trees will be planted by them tomorrow.

??5.Lucy is writing a letter now.?A letter is being written by Lucy now.

??6.You must lock the door when you leave.?the door must be locked when you leave.

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??1.???????????

??What will happen in 100 years.

??The dinosaurs disappeared about 65 million years ago.

??2.????????????????

??This pen writes well.

??This new book sells well.

??3.?????????????to??????????????to ?????????????to ?

????make somebody do something?somebody+ be +made to do something

??see somebody do something?somebody +be +seen to do something

??A girl saw my wallet drop when she passed by.?My wallet was seen to drop by a girl when she passed by.

??The boss made the little boy do heavy work.?The little boy was made to do heavy work by the boss.

??4.??????????????????????(?)??????????????????????????????

??He gave me a book.?A book was given to me by him.

??He showed me a ticket.?A ticket was shown to me by him.

??My father bought me a new bike. ?A new bike was bought for me by my father.

??5.?????????????????????????????????????????

??We can�t laugh him. ?He can�t be laugh by us.

??He listens to the radio every day. ?The radio is listened to by him every day.

??The nurse is taking care of the sick man. ?The sick man is being taken care of by the nurse.

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