- What's the difference between "in front of" and "across from"?
I think the difference is at least in part a question of distance. If a person is standing on the sidewalk next to a house he is in front of the house. A house on the other side of the street is across from the house.
There is no difference between going up the street and going down the street. They mean the same thing. (It's a quirk of the language.)