Grammar for Exodus 2:17

וַיָּבֹ֥אוּ הָרֹעִ֖ים וַיְגָרְשׁ֑וּם וַיָּ֤קָם מֹשֶׁה֙ וַיּ֣וֹשִׁעָ֔ן וַיַּ֖שְׁקְ אֶת־צֹאנָֽם׃

And the shepherds came and drove them away; but Moses stood up and helped them, and watered their flock.