1. The sentence "Beyond a desolate green hill" describes the poet standing by the river and looking into the distance. Only the boat is far away from people, but the green hill is like a dress, which conveys the poet's feelings of farewell to friends, loneliness and disappointment.
Although the title of the poem is Farewell, there is no farewell scene in the poem. The poet expresses his parting thoughts through distance and meditation with the help of the scenery in front of him.