与过去事实相反 　　had + 过去分词 　　should /would/could/might + have + 过去分词 　　与现在事实相反 　　一般过去时(be用were) 　　would/should/could/might + 动词原形 　　与将来事实相反 　　一般过去时或should(were to) + 动词原形 　　would/should/could/might + 动词原形 　例句：

　　1. 表示与现在事实相反

　If I ____________(have) enough money now ， I _______________________(lend) it to you.

　　If I ___________(be) you ， I would go to tell him the real feeling upon him.

　　2. 表示与过去事实相反

　　If he ___________________(take) your advice ， he wouldn't have made such a bad mistake.

　　She _____________________________(come) to enjoy the party if she hadn't been very busy.

　3. 表示与将来事实相反

　　I would go shopping with you if it ______________________(be)Sunday tomorrow.

　　If he were to be given another chance to do it again， he could certainly achieve more.

　　考点例题：

　　1)_________, I'd have done it myself.

　　A. If I would have known it B. If I had have known it

　　C. Had I known it D. Should I known it

　　2)If the doctor hadn't tried their best to save you, you ______________________(not stand)hear now.

　　3) It's high time that something _________ to prohibit selling fake commodities.

　　A. must be done B. was done C. be done D. were done

　　4) He insisted that we all ____ in his office at one o'clock.

　　A. be B. to be C. would be D. shall be

【模拟试题】

（一）用框内所给词组的适当形式完成下列句子（其中两个是多余的）

aim at； a great deal； scores of； focus on； take the place of；

make an attempt, be worthy of, be possessed with 　1. He has done ____________ to help me with my English.

　2. She loved her mother so much that no one could ___________ her mother.

　3. ___________ people are standing in line for registration in the hall.

　4. Modern medicine has tended to ___________ developing highly complicated surgical techniques too much.

　5. The boss of our company __________ training everybody by the end of this year.

　6. She ________ the idea that something bad would happen.

　7. He __________________ to escape from the prison, but failed at last.

　8. Let's hope she proves __________ all that has been done today.