完成进行时态
什么叫完成进行？
什么叫完成进行时？
当英语完成和进行时，它不仅可以作为两个相对独立的时态，也可以组合成一个新的时态，即完成进行时。从动作的连续状态来看一个动作。如果从时间的角度来看，它可以分为过去的完成时间、现在的完成时间、未来的完成时间和其他一些时态。这意味着行动已经完成，直到某个时间
完成状态下的四个时态？
1、现在完成的时候
the present perfect continuous tense
概念：意味着某个动作从过去的某个时间开始，延续或重复到现在，也将延续到未来；
We have been working on this project for over a month now.
It has been raining for two hours.
It seems oil has been leaking from this pipe for some time.
2、过去完成进时候
the past perfect continuous tense
概念：与过去的某个时刻相比，对现在有直接影响并仍在进行的行动；
She had been suffering from a bad cold when she took the exam.
John had been asking me the same question for almost 6 times.
I had been looking for it for days before I found it.
3、以后完成的时候
the future perfect continuous tense
概念:意味着动作从未来的某个时间延续到未来的某个时间， 并且可能继续；
Vicky will have been working in this School for 12 years by the end of next year.
The play is coming off in August. By then it will have been running for three months.
By the time John retires, Jerry will have been teaching for 10 years.
4.过去和未来的完成
the past future perfect continuous tense
概念:意味着动作从过去的某个时间一直持续到过去的某个时间，并且可能会继续；
I heard that by May Vicky would have been working here for twelve years.
She told me she would have been teaching in the university for 20 years by that summer.
He said that by the end of the spring term he would have been studying English for three years.