Questions & Answers about Собака бежит за овцой, а я бегу с палкой.
Since this lesson is about the verbs гнать and гонять (to chase/herd), why doesn't this sentence say Собака гонит овцу?
Both describe "chasing," but with different nuances. Гнать is a transitive verb meaning "to drive" or "to herd." If you say Собака гонит овцу, the dog is actively forcing the sheep to move forward. Бежит за овцой literally means "is running after the sheep," which focuses only on the dog's own movement rather than its control over the sheep.
Why is the sheep (овцой) in the instrumental case?
The preposition за takes the instrumental case when it denotes location ("behind") or pursuit ("after"). Therefore, бежать за followed by the instrumental case is the standard way to say "to run after" someone.
Just as a refresher, why are the verbs бежит and бегу used instead of бегает and бегаю?
Бежать is a unidirectional verb of motion. It is used here because the action is happening right now, in a single instance and in a specific direction. If you were describing a regular habit (like "The dog runs after sheep every day"), you would switch to the multidirectional verb бегать and say Собака бегает за овцами.
Why use the conjunction а instead of и to mean "and" here?