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人口が増える [ に伴い/とともに ] 周辺もにぎやかになってきた。
Jinkou ga fueru (ni tomonai/to tomo ni) shuuhen mo nigiyaka ni natte kita

Both the options seem grammatically correct. What's the difference then? Or do I understand it wrong?

IUnknown
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1 Answers1

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AFAIK, they are nearly identical and interchangeable. One of my grammar books has the exact same wording for both structures.

~すると、それと一緒に
動詞の辞書形/名詞 + {に伴って・とともに}

参照: Proportion and Rate

istrasci
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