1、北师大 高二 Unit 21,Unit 21 Human Biology,Grammar - Mixed Conditionals,1. If American athlete Marion Jones hadnt taken drugs, would she have made it to the Olympics at all? 2. If peter was a more skillful player, he would have scored more points.,Mixed conditional,Read the sentences:,3. Ben Johnson would
2、 still be the 100 metres world record holder, if he had not been caught. 4. If he had broken that record, he would be a world-famous runner now.,混合条件句是指混合条件句中含有不同的条件结构。e.g. If you had followed my advice just now, you would be fine now.注意这个句子, 条件从句的时间状语是just now, 而主句的时间状语是now, 构成了混合条件句。,想象过去的事件可能对现在有
3、影响： If he had broken the record, he would be famous now. If they hadnt invited me to the party, I wouldnt be here.,结构：If + 过去完成时，would+ 动词不定式（不带to）,非真实的常常是想象中的现在状态，可能对过去有影响： If he was/ were a more skillful player, he would have scored more points. If she didnt speak a few languages, she wouldnt have
4、 got that job.,结构：If + 过去时, would+ have+ v-ed,What would the situation be now if performance-enhancing drugs hadnt been developed? What would the situation be now if penicillin had not been discovered?,Oral Practice between partners.,What would the situation be now if the computer had not been inven
5、ted?What would the situation be now if the Second World War had never broken out?,What would the situation be now if performance-enhancing drugs hadnt been developed?Some of the world records would not be broken now. What would the situation be now if penicillin had not been discovered? Most of the
6、patients would die.,The other two questions are left for you!,1. John weighs 300 pounds. he had to have the seat in his car repaired.he joined a basketball team at school.he had problems losing weight,Join the sentences together.,If John didnt weigh 300 pounds, he wouldnt have had to have the seat i
7、n his car repaired. If John didnt weigh 300 pounds, he would have joined a basketball team at school. If John didnt weigh 300, he wouldnt have had problems losing weight.,2. Jessica has been a world-class dancer since she was 11. she suffers from back problems.she is a famous person now. she is able
8、 to support her family.,If Jessica hadnt been a world-class dancer since she was eleven, she wouldnt be suffering from back problems. If Jessica hadnt been a world-class dancer since she was eleven, she wouldnt be a famous person now. If Jessica hadnt been a world-class dancer since she was eleven,
9、she wouldnt have been able to support her family.,Exercises,1. You did not let me drive. If we _ in turn, you _ so tired. A. drove; didnt get B. drove; wouldnt get C. were driving; wouldnt get D. had driven; wouldnt have got,2. _ the clouds, you would find the airplane in the sky easily. A. Had it n
10、ot been for B. If it were not C. If it had not been for D. Were it not for,3. If the hurricane had happened during the day-time, _ more deaths. A. it would have been B. it would be C. there would be D. there would have been,4. _ hard, he would have passed the exam. A. If he were to work B. Had he wo
11、rked C. Should he work D. Were he to work,5. I did not see your sister at the meeting. If she _, she would have met my brother. A. has come B. did come C. come D. had come,6. Without electricity, human life _ quite difficult today. A. is B. will be C. would have been D. would be,7. If he _ his legs yesterday, he _ with us now. A. hadnt hurt; would go B. hadnt hurt; would have gone C. didnt hurt; would go D. didnt hurt; would have gone,
