多维训练

　　(1)根据句意用适当的情态动词填空

　　①I should have helped Peter with his work，but I had a lot of things to do myself.

　　②In his teens，Charles Dickens lived a poor life，which must have contributed to his later writing.

　　③Some people may not have plans yet for New Year’s Eve，but others know exactly what they will be doing.

　　④We could have faced the difficulty together，but why didn’t you tell me?

　　⑤—They are said to have been familiar with each other.

　　—But they could not have been.They were introduced only hours ago.(2015·江苏苏锡常镇四市调研)

　　⑥—I sent him a most interesting story book by mail this morning.

　　—You need not have done so; he’s coming tomorrow morning.

　　(2)单句改错

　　It must rained last night，for the road is all wet.rained前加have

　　——单句语法填空

　　(1)If I were(be) a bird，I could fly.

　　(2)You could answer most of the questions now if you had reviewed (review) the lessons last night.

　　(3)Were(be) it to rain the crops would be saved.

　　(4)I didn’t hear the phone.I must have been (be) asleep.

　　(5)I could have worked (work) out the problem，but I was too nervous.

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