I don't think the present continuous works , but in my opinion the others are fine if you go on to describe a period of time. The company has been consisting of 50 employees for about a year now. This would be no different in effect from the present perfect, but if you add "about" or "approximately" the continuous makes more sense, allowing for some variation - which the present perfect could not.
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I'm wondering if there's a difference between "continuous" as one long event, and "continuous" as a series of similar events. I have been taking early morning walks throughout the greater part of my life.
AnonymousOr even a past perfect continous in this sentential situation correct?The past perfect continuous does not work in that sentence, and there is also no justification for the past perfect simple. There is nothing that justifies the use of the past perfect at all in that sentence. T
By then, this company had been consisting of 50 employees