高三英语结构语法之虚拟语气课件(共19张PPT)

英语结构语法之 虚拟语气 结构说明 一个精神实质 三种与事实相反 五个情态动词 七个典型句式 一个精神实质： 在从句中，与现在事实相反用过去时；与过去事实相反用过去完成时。 I wish I knew the answer now, but I don’t. I wish I had known the answer then, but I didn’t. 三种与事实相反 did Had done Would do Would have done Did/were to do/ Should do Would do 种类 从句 主句 与将来 与现在 与过去 例如： 与将来 If it should rain tomorrow, we would not hold the meeting. 与现在 If I had time, I would go there now. 与过去 If you had come earlier, you would have meet him. 五个情态动词 1. Would(会不会) If I were you, I would accept her present. 2. Could(能不能) Given more time, the director could have made a better film. 3. Should /Ought to(该不该) The flowers are dead. I should have given it more water. 4. Might(也许) If you hadn’t reminded me, I might have forgotten. 5. Needn’t(本不必) It was so near. We needn’t have taken a taxi. 七个典型句式 1. If only she had a car. If only she had known the answer then. 2. She feels as if she had a fever. They talked as if they had been friends for years. 3. I’d rather I hadn’t t