Present perfect continuous tense I have been colecting shells for five years.I started to collect shells five years ago.He began to collect coins two years ago.He has been collecting coins for two years.She started to collect stamps last year.She has been collecting stamps for a year.现在完成进行时现在完成进行时含义：动作自过去某时开始，一直延续到现在，并且还将持续下去；动作从过去某时开始，一直延续到说话时刻，可能刚刚结束。进行时进行时 I am reading the book.完成时完成时 I have read the book.现在完成进行时现在完成进行时 I have been reading the book.现在正在读现在正在读已经读过已经读过过去到截至过去到截至说话为止，说话为止，一直在读一
