Across and Over
They both mean 'on the other side of' or 'to the other side of'
- He jumped over/across the stream.
- His house is just over/across the road.
Over means a movement to the other side of something high.
- He is climbing over the wall.
- The bird is flying over the tree.
- The noisy aeroplane flew over the city.
Across means a movement to the other side of a flat area.
- Last week, we walked across the desert.
- Sometimes children run across the road carelessly.
- They walked acrossed the bridge.