"Did I charter a train and take it to the sea?" vs. so this is simple past tense. What do we call the verb that changes the tense, while the others retain their present base form?
But now in the answer form (the previous is inquisitive and not declarative, what do we call this/mood/aspect...? sigh):
"Yes, I did charter a train and took it to the sea."
Now 'did charter' appears to be past perfect (but its not!) as 'took' sounds appropriate as a past tense form in this sentence following on what appears to need to be past perfect...? vs. the previous sentence in the inquisitive mood.
But I am not sure - I am a native speaker and am 40 years old. But I cannot explain the difference and why it exists...
"Did Peter charter a train and take it to the sea?" (did charter & take) "Yes, peter did charter a train and took it to the sea." (did charter & took)
Also, this "did charter" could hav been repaced by "yes, Peter chartered".
However sometimes we answer,
Did you do it? Yes I did...
So... Any help on explaining the diff. of tense use here from the title question? I cannot, not at all, but it's a curious little quirk I hope someone can help as to also WHY - not only WHAT - the diff is.
Maybe the difference lies in what types of verbs the two sentences' "did's" are, but I am not sure what they are...