nkspb Are they all grammatical? Yes, though the third needs further context. nkspb If they are all correct, what's the difference in meaning?
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nkspbAre they all grammatical?Yes, though the third needs further context.
nkspb If they are all correct, what's the difference in meaning?There is no difference in basic meaning; they are simply different verb aspects. You can read about their uses here:
nkspbfound many usages of the Past Simple/Continuous tense, but I doubt whether it is correct.Hmm. I don't think Google is as unreliable as all that.