2. 180-degree-rule
One of the most basic continuity rules is the 180 Degree
Rule.
The 180 Degree Rule states that two characters in a scene
should always have the same left/right relationship to each
other. If you don't follow the 180 Degree Rule, or break it
intentionally, it disrupts the scene disorients the audience.
When you break the 180 line,
a person who was originally facing
left in a scene is all of the
sudden facing right.
3. Match on action
Match on action is a technique of filming used in many
sorts of films. It consists of connecting 2 shots together in
which a character finishes off an action in the second shot
that was started in the first one, for example a clip of a
character walking through a door in which he opens
the door being filmed from
behind then the clip cuts to
him walking through from the
other one.
4. Shot-reverse-shot
Shot reverse shot is a film technique where one character
is shown looking at another character, and then the other
character is shown looking back at the first character.
Since the characters are shown facing in opposite
directions, the viewer assumes that they are looking at
each other.