引用:
原帖由 Frank妈 于 2008-10-5 16:59 发表 
第1句
I'm not thirsty because I drank a lot of water this morning. 感觉上是指现在不渴，因为早上喝过水了(过去时)
第2句
She started to go to school at the age of five. She was the youngest pupil in h ...
第三句，for three hours,应该用现在完成时，Bill has played.......
