سِرْتُ وَالنَّهْرَ
Translation: I walked alongside the river.
سِرْتُ: past verb, first-person subject suffix -tu.
وَ: wāw of accompaniment.
النَّهْرَ: accusative accompaniment complement.
An added example: the river does not walk as a human subject would; the phrase describes the path along which the speaker walked.