描述时间1. It is (has been)+一段时间+since sb. did sth.2. It/this/that is the first(second) time that sb. have done sth.3. It is +形容词的最高级+that sb. have done sth.4. Hardly/scarcely had sb. done sth. when sb. did sth.5. No sooner had sb. done sth. than sb. did sth.6. It was the first/ last time that sb. had done sth.7. be doing sth. 8. be about to do sth. when sb. did sth.9. have done sth.过去的时间，（过去完成时）10. By the time of +现在的时间， +主句（现在完成时）将来的时间，（将来完成时）11. It was +一段时间 before sb. did sth. “过了多久某人才做某事”12. It will be +一段时间 before sb. do sth. “要过多久某人才做某事”13. not until14. It is not until. that15. Not until + 从句+ 倒装句16. 非谓语作状语从句：Dating back to (时间状语从句). , 主句17. is a time when + 定语从句描述地点1. There be/ exists/ lives/lies/ stands2. 非谓语作状语从句：Located in , 主句3. where 引导的状语从句或定语从句a) The suitcase lay opposite to where I was standing.b) I often imagine what the college life would be like where I am going to spend the most precious time in my life.4. 全部倒装句: （介词短语+ 谓语+ 主语） The library is in the center of our school. In the center of our school lies the library.描述缘由1. The reason why + 从句 is that + 从句2. The reason is that+ 从句3. That is because+ 从句4. What impresses me most is that5. because of/ due to / owing to/ thanks to/ on account of+ 短语6. With . , 主句描述结果1. 从句， for which +结果从句2. so/such . that 3. too to 4. The + 比较级， the+ 比较级5. 非谓语引导结果状语从句主句，+ doing（自然而然的结果）主句，+ only to do（出乎意料的结果）描述目的1. In order to2. so as to do3. With the aim/ purpose of4. 从句+ whose aim is to do5. 从句+ which aims at doing sth.发表观点1别人观点 it is universally acknowledged/recognized/agreed that+ 从句 it is said/ reported/ known that+ 从句 Others claim/ argue that + 从句 The rest hold the view that +从句2. 自己观点 in my opinion/ in my point of view/ in my mind, + 句子 as far as I am concerned, +句子 I find/ consider it + adj. to do sth. personally, I think I have the strong belief that + 同位语从句表达心情1. I am + delighted / awfully sorry to do sth. that + 从句2. It is my great honor and pleasure to do sth.3. It is a pity/ shame that +从句4. Nothing in the world can + v. + me so much as +doing sth.5. It gives me much pleasure to learn that 6. So + adj. am I to learn that + 从句进行呼吁1. It is high time that sb. should do sth.2. Some measures should be taken to do sth.3. Some attention should be paid to do sth.4. Come and do sth. without no hesitation!5. We are ought to arouse the awareness of doing sth.6. I am convinced that讲解并描述条件1. Only in this way can we + 从句2. Only by doing sth. can we + 从句3. 祈使句+ and /or + 简洁句4. 主句+under the condition that/ as long as/ if/ unless+ 条件从句（只有才能）提出建议1. I suggest/ recommend/ propose that sb. should do 2. My suggestion/ recommendation is that sb. should do3. It is + a(an) adj. +way/ approach to do sth. by doing sth. 4. _ is the key to _.5. I think _ is of great significance/ value/ use.6. Doing is 7. You better do sth.信息介绍1同位语1) My nane is Li hua, monitor of class 2.2) Kunming, a comfortable city, is located in southwest of China.3) The Spring festival, an important day for Chinese, falls on the last day on Chinese lunar calendar. .4) The Art Festival, an annual festival celebrated in our school, is around the corner.2非谓语作后置定语My nane is Li hua, coming from China，Xin Hua Middle school.aged 18.3. 定语从句表示感谢与希望1.I would appreciate it if + 从句2. I would be very thankful/ grateful if + 3. I would extend/ express/ convey my sincere thanks/ gratitude/ appreciation if + 从句1.I do hope that+从句2. How I wish that you can do sth.3. I am looking forward to doing sth.恳求帮忙1. I wonder whether you could do me a favor to do sth.2. I want to know if it is convenient for you to help me do sth.3. Could you give me an assistant to do sth?4. Are you available to do sth.?询问信息1. Id like to know something more about2. Would you mind telling me something about?3. Is it possible for you to inform me of some details about?揭示现象1. There is no doubt that +从句2. It is no wonder that +从句3. There is no denying a fact that + 从句/ No one can deny the fact that4. As a saying goes, 5. As you know,6. It goes without saying that7. It is obvious that8. It seems that