She said I could borrow her camera as long as I ___ care of it.
Take / Took / would take.
We had this question answered in class and I think my teacher's answer was incorrect. (as he states that only “took” is right)
She said I could borrow her camera as long as I took care of it.
seems most natural to me of the three alternatives in the question. I would be more inclined to say
She said that I could borrow her camera as long as I took care of it.
but then my personal style tends toward the wordy.
Using "take" simply does not agree in tense. "would take" is possible, but I think awkward.