2. It is possible/impossible for sb to do sth.某人能够/不能够做某事

　　3. There are many advantages and disadvantages(做某事)有利也有弊

　　4. It doesnt take into account the fact that -------根本不考虑这样一个事实

　　5. It can be quite discouraging to do sth.做某事令人扫兴

　　6. It is not uncommon for sb to do sth某人通常做某事

　　7. It has been widely accepted that 普遍认为

　　8. There is no reason to doubt that 毋庸置疑

　　9. It used to be widely believed that 过去通常普遍认为

　　10. It is now clear that---现在很清楚的是

　　11. It is acceptable to do sth可以做某事

　　12. There is a popular belief that----普遍认为

　　13. It is so hard to do sth that----- 做某事太困难而不能够---

　　14. This is to say这也就是说

　　15. Sb has/have reason to do sth某人有理由做某事

　　16. It is extremely difficult to be sure about确信---是极其困难的

　　17. My point is that我的观点是

　　18. It is also human nature to do 做某事是我们人类的本性

　　19. Example is better than precept身教胜于言传

　　20. It will be sbs responsibility to do sth做某事是某人的职责

　　21. It is obvious that很明显

　　22. It has been thought and said that众所周知

　　23. There are several factors that contribute to sth.又许多原因归因于某事

　　24. The event gained national attention事情引起全国关注

　　25. It is important for sb to do sth某人做某事是很重要的

　　26. There is no denying that毋庸置疑

　　27. have something to do with与---有关系

　　28. have nothing to do with与---无关

　　29. The business of America is business.美国人的大事是经济

　　2. It is possible/impossible for sb to do sth.某人能够/不能够做某事

　　3. There are many advantages and disadvantages(做某事)有利也有弊

　　4. It doesnt take into account the fact that -------根本不考虑这样一个事实

　　5. It can be quite discouraging to do sth.做某事令人扫兴

　　6. It is not uncommon for sb to do sth某人通常做某事

　　7. It has been widely accepted that 普遍认为

　　8. There is no reason to doubt that 毋庸置疑

　　9. It used to be widely believed that 过去通常普遍认为

　　10. It is now clear that---现在很清楚的是

　　11. It is acceptable to do sth可以做某事

　　12. There is a popular belief that----普遍认为

　　13. It is so hard to do sth that----- 做某事太困难而不能够---

　　14. This is to say这也就是说

　　15. Sb has/have reason to do sth某人有理由做某事

　　16. It is extremely difficult to be sure about确信---是极其困难的

　　17. My point is that我的观点是

　　18. It is also human nature to do 做某事是我们人类的本性

　　19. Example is better than precept身教胜于言传

　　20. It will be sbs responsibility to do sth做某事是某人的职责

　　21. It is obvious that很明显

　　22. It has been thought and said that众所周知

　　23. There are several factors that contribute to sth.又许多原因归因于某事

　　24. The event gained national attention事情引起全国关注

　　25. It is important for sb to do sth某人做某事是很重要的

　　26. There is no denying that毋庸置疑

　　27. have something to do with与---有关系

　　28. have nothing to do with与---无关

　　29. The business of America is business.美国人的大事是经济