Союзы - Союзы последовательности

earlier than a particular action or event

до

used to say that something will happen, when another thing has been concluded

после

used to indicate that something will happen immediately after a certain condition or event occurs

как только

up to the point in time or the event mentioned

до тех пор

as soon as, immediately after

как только

used to indicate that an action or event follows another one without delay or hesitation

как только

used to indicate that something occurs immediately, without delay or hesitation after something else

немедленно

immediately after this; because of something mentioned

после чего