怎么把这些句子改成被动语态1Wecanworkouttheproblemintenminutes2Billlooksafteracatcarefully3Isawhimgointotheclassroom4Mothergavemeanewdeskasapresent5Imademylittlebrotheramodelshiplastweek6Wemust

Question

怎么把这些句子改成被动语态
1 We can work out the problem in ten minutes2 Bill looks after a cat carefully 3 I saw him go into the classroom 4 Mother gave me a new desk as a present5 I made my little brother a model ship last week6 We must keep our classroom clean 7 You should water the flowers every day 8 The teacher will ask you some quwstions 9 He always makes us laugh happily

Answer 1

1.The problem can be worked out in ten minutes by us.2.A cat is looked after carefully by Bill.3.He was seen to go into the classroom4.I was given a new desk as a present by mother.5.A model ship was made to my little brother last week.6.Our classroom must be kept clean by us.7.The flowers should be watered every day by you 8.You will be asked some questions by the teacher 9.We are always made to laugh happily by him.