I don't think you can 'sum the whole thing up' so neatly, though you are generally right. Perfect progressive needn't be ongoing, though it may be likely. He has been eating does not necessarily mean that he has not finished doing so.
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Virginiajean simple progressiveI've never heard of this tense. Do you mean simple past progressive? Or maybe present progressive?
VirginiajeanI mainly referred to the progressive aspect of a verb, could be in the past, present, future-- as in 'is eating' compared to 'has been eating'; 'was eating' compared to 'had been eating'.. etc..Progressive aspect indicates action in progress. The action in progress is happening generally in the past, present, or future depending on the tense itse