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六、 Fill in each blank with “ought (not) to” and the given verb in its proper form: 1.As a nurse, you（ ought to be ）very patient with your patients. 2.（ Ought ）she（not to take up ）(take up) that job? — Yes,she ought to. 3.He（ought to see ）(see) a doctor about his headache a week ago. 4.She was so unhappy. You（ought not to ） (hurt) her feelings. 5.That house was not very old.It（ought to be knocked down ）(knock down). 6.If they had started at 7,they （ought to have got）(get) there by now. 7.There （ ought to be）(be) more hospitals in such a densely populated（人口稠密的） area. 8.I think something （ought to do ）(do)about it. 七、 Complete the following sentences, using “could(not) have+p.p.”: 1.Mary（could have bought a coat）(本来可以买件大衣)，but she chose to lend the money to a needy neighbour. 2.If it hadn’t been for your help, we（couldn't have succeeded in the experiment in such a short time ）（不可能在这么短的时间里就在实验上取得成功）。 3.You（ could have made up ）（本来可以制订） a more detailed(详细的）plan. 4.I（could have lent you）（本来可以借你） the money.Why didn’t you ask me? 5.Her husband（could have helped her）（本来可以帮助她的），but he did not choose to. 八、 Rewrite the following sentences after the models: Models: Surely what you said is true. What you said must be true. I think my father was hurt. My father must have been hurt. 1.I think the clothes were washed by Mary.The little girl is quite a help to her mother,you know. The clothes must have been washed by Mary. ...2.Surely he is at least thirty years old. He must be more than thirty years old. 3.Alice looked pale yesterday.I suppose she was ill. Alice looked pale yesterday. She must be ill4.Surely they are tired. They have been working the whole day.They must be tired. They have been working the whole day.5.I think the examination was very difficult since none of the students passed. The examination must be very difficult since none of the students passed. |
