Indicates a specific moment...
Inmediately at or shortly after the time...
Indicates the beginning of the period of time.
Means "during the period of time"...
The action happens after another action...
It makes reference to the moment previous to an action.
It indicates something that happened next...
Marks the end point of the period of time.
SINCE
WHILE
ONCE
WHEN
AS SOON AS
UNTIL
AFTER
BEFORE