2010.12英语示范课-if引导的虚拟语气(学生版)

2010.12英语示范课-if引导的虚拟语气(学生版) Grammar—Subjunctive mood led by “if” Step1. Lead-in Enjoy an English poem and pay attention to the verb tenses. If you were a teardrop, in my eye, For fear of losing you, I would never cry. And if the golden sun, should cease to shine its light, Just one smile from you, would make my whole world bright. 译文: 如果你是我眼里的一滴泪，为了不失去你，我将永不哭泣; 如果金色的阳光停止了它耀眼的光芒，你的一个微笑将照亮我的整个世界。 Analyze the poem: A. Can you be a teardrop in my eye? B: Will the sun cease to shine its light? Step2. Distinguish the following sentences. ? Sales of products fall if prices rise. ? If I go to Beijing, I’ll travel by train. ? If I went to Beijing, I would travel by train. ? If the sun were to/ should go out tomorrow, we would have to live in the dark. ? If you had started out earlier, you would have caught the first train. ?真实条件句: 非真实条件句: Q1: Please tell us which sentence means that things will definitely happen. Q2: What does sentence ? tell us? Q3: What is the fact of sentence ?? Q4: What’s the fact of sentence ?? Q5: What is the fact of sentence ?? 1 Step3. Examine the chart and learn by heart the verb forms. 1. 真实条件句(Real conditional sentences) If 从句(谓语动主句(谓语动例句 真实情况 词) 词) Sales of products fall if prices rise. 现在时 现在时 绝对真实 If I go to Beijing, I’ll travel by train. 现在时 将来时 可能发生 2. 非真实条件句(Unreal conditional sentences) If 从句(谓语动词) 主句(谓语动词) 真实情况 (be动词用 ) would/ / / + 动词原形 与现在事实相 反 或 would/ / / + 动词原形 与将来事实相 / + 动词原形 反 + would/should/could/might + +过去分与过去事实相 词 反 Step4. Translation 1. 如果我今天没有课，我就和我的朋友去逛街了。 2. 如果明天周杰伦来我们学校，我会非常高兴。 3. 如果她那时有足够的钱，她就买下那件大衣了。 Step 5. Oral practice. 1.——What would you do if you had one million yuan? ——If I had one million yuan, I would . 2. ——What would you do if you got a ? (Magic Lantern, Magic Brush, Doraemon) ——If I got a , I would . 2 3. ——What would you do if it were Christmas Day / the Spring Festival tomorrow? ——If it were Christmas Day/the Spring Festival tomorrow, I would . 4. ——If I were , I would . Step6. Exercises 1. If my brother (be) at home now, I would ask him for help. 2. If we had time at present, we (go) with you. 3. If Tom (be) more careful in the exam, he would have passed it already. 4. If I had met you yesterday, we (go) to the concert together. 5. If Robots (control) the world some day, there would be no friendship. 6. If it (snow) tomorrow, we could make a snowman. ?如果if 从句中含有should, had(助动词), were 等词时，可将if省略，并把should, had, were 提前至句首。 E.g If I had much money, I would go abroad.? Had I much money, I would… If he had been more careful, he would have passed the exam already.,Had he been more careful, he would have… 3 ?Please change the following sentences into Inversion. ? If I were in your position, I would accept his invitation. , ? If you should need more information, please telephone our main office. , ? If Alex had asked, I would have been able to help. , ? If the talks were to fail, it would be a serious setback. , Step7. Homework—Writing —If you were an English teacher, what would you do? According to this topic, write a composition giving your suggestion. 4