31.  Over the past years, I have accumulated a certain number of vocabularies and grammatical knowledge which help me do well on my school work.

32.  I have been learning English for many years.

33.  These years.

34.  I have learnt English for many years.

35.  For thousands of years, food had always been eaten cold and raw and it's no doubt that when people tasted food that had been cooked for the first time, they found it tasted better.

36.  I have been learned English for years.

37.  Though we have spent years dealing with it, we must continue the study.

38.  And I have to emphasize in the end that our corporation has been in partnership with several leading corporations in IT industry for years, which means that we are accessible to the core technology which is fundamental to the project.

39.  So in the past few years, my English had not any progress.

40.  During the past years .