把 do something to it
6 phrases把 moves the object in front of the verb, and it is used when something is done to that object - moved, closed, lost, finished. 把门关上 is not the same as 关门: it says this specific door, and something happened to it.
把 moves the object in front of the verb, and it is used when something is done to that object - moved, closed, lost, finished. 把门关上 is not the same as 关门: it says this specific door, and something happened to it.