主要内容
完成进行体
当描述之前在进行但是已经完成的行动时,可以使用完成进行时态,比如”I had been waiting for twenty minutes“.
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why you use "have done something", when you say "you will have done something for a long time ", that is conflict to 「have been + Verb-ing」(1 票)
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hello grammarians previously I had covered three of the basic aspects of English and that's simple perfect and progressive and so there's just one more and it's a combination of the last two and it's called the perfect progressive and to recap what those two things do is what the perfect does is it denotes something that is complete and the progressive notes something that has been ongoing and it seems like those two things together don't make a whole lot of sense but I promise that they do you can use the perfect progressive aspect to say that you've been doing something for a long time or you will have done something for a long time or that you had been doing something continuously in the past and now it's stopped so let me explain how the perfect progressive is constructed do you take the verb to have and then you combine it with the word bin and then the verb in question and then the ending I and G so as with all of our aspects the only part that changes is this have stuff this is the this is the only word that changes depending on which tense you situated in so in the past you would say I had I had been eating cookies in the present you would say I have been eating cookies in the future you can say I will have been eating cookies so you can use the perfect progressive aspect in a couple of different ways you can say that something had been ongoing in the past and is now done you can say that it's been ongoing in the past and is still happening now you know I have been eating cookies all morning and I have no intent to stop or you can use the perfect progressive to say how long something has been going on so you can say I've been eating I will have been eating cookies for 40 years come next Thursday and I have no regrets you know you can say how long something has been going on using this aspect but you get the idea so the perfect progressive is formed by combining have and have is the part that changes I had been I have been I will have been with bin and the verb in question with an ING ending you can learn anything David out