They are both possible. I detect hardly any difference in meaning.
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Anonymous"Ever since then, I have been dedicating most of my time to studying."
or
"Ever since then, I have dedicated most of my time to studying." They both describe the same situation, referring to a period of time between a "distant" past event and the very "recent" past.
The only difference to my ear is the "continuous" action of the dedicat
Anonymous"Ever since then, I have been dedicating most of my time to studying."I would not choose this one because I don't like the effect of multiple -ings so close together. Secondly, I don't care for the use of the abstract verb dedicatein the continuous aspect here. I don't sense that people "sit around (
CalifJim I don't sense that people "sit around (doing) dedicating".But even very strange people need to be able to describe what they do.
AvangiNeither tense addresses whether or not the action continues into the present
English 1b3[ I could of course be wrong.Me too. I understand the term "perfect" to mean "complete." The action is a done deal. "I have died." I'm not still dying in the present.
AvangiI think I've read opinions that the action continues in the present, but they just confuse me.The way I see it, it's more that the consequence or relevance of the action continues into the present, not the action itself.
AvangiI understand the term "perfect" to mean "complete."I have heard this explanation countless times, and it has never made a bit of sense to me. I think it's a bogus explanation. If anything expresses completeness it's the past tense. The better explanation, I think, is the one implicit in the terms "definite past" (simple past) and "indefinite past" (