Is the following sentence correct?-Est-ce que tu te souviens de notre excursion en montagne? -Oui, je m'en souviens!

The sentence is correct. The verb “se souvenir” is followed by “de,” and the pronoun “en” replaces “de notre excursion en montagne.” So “Oui, je m’en souviens” means “Yes, I remember it.”

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