虚拟语气25172.ppt

if only表示“如果……就好了” if only 后面的句子如果是对现在或将来情况的虚拟，用过去时did； 如果是对过去情况的虚拟，用过去完成时had done。 例如：If only the alarm clock had rung. If only I were rich. As if As though as if，as though引出的与事实不符的状语从句中，谓语动词用虚拟语气。用一般过去时表示对现在情况的模拟，用过去完成式表示对过去情况的虚拟。 例如：The moon shines brightly, as if it gave off light by itself. I was horrified at his appearance. He looked as though he hadn’t slept for weeks. 含蓄虚拟结构 例如：What would I have done without you？ = What would I have done if I had not been with you. 这里，without you就是一个“含蓄虚拟结构”。 含蓄虚拟结构 请特别注意下面句子中的“含蓄虚拟结构”： In his position, I would commit suicide. =If I were in his position, I would commit suicide. But for their help, I would not have completed the task. = If it hadn’t been for their help, I would not have completed the task. 含蓄虚拟结构 But for the sun, there could be no life on the earth. = If it were not for the sun, there could be no life on the earth. But that the doctor arrived on time, they would have been dead. = If the doctor hadn’t arrived on time, they would have been dead. （注意：But that +从句，从句不用虚拟，而是主句用虚拟。） 含蓄虚拟结构 Given more time, I would have finished the test. = If I had been given more time, I would have finished the test. We didn’t know his telephone number, otherwise we would have telephoned him. = If we had known his telephone number, we would have telephoned him. 例题解析 例1. 【03】It’s urgent that a meeting ____ before the final decision is made. A. will be arranged B. must be arranged C. be arranged D. would be arranged 例题解析 例2. 【04】_____ the advice of his friends, he would not have suffered such a heavy loss in his business. A. If he took B. If he should take C. Were he to take D. Had he taken 精选练习 1. You didn’t let me drive. If we ___ in turn, you___ so tired. A. drove; didn’t get B. drove; wouldn’t get C. were driving; wouldn’t get D. had driven; wouldn’t have got