Conjunctions of Time

The conjunctions 'after ' and 'before' are used to indicate the order in which events occur. 'Before' is used to indicate that one event happened earlier in time than another event, while 'after' is used to indicate that one event happened later in time than another event.
When 'before' is used at the beginning of a sentence, it sets up the context for the subsequent clause to describe an event that occurs later in time. In contrast, when 'after' is used at the beginning of a sentence, it sets up the context for the subsequent clause to describe an event that occurs earlier in time.

The conjunction 'when' is used to indicate the time at which two events occur, often when they happen simultaneously or in close proximity to each other. It can also be used to indicate that one event occurs immediately after another event. Here are the examples:

When used as a conjunction, 'while' indicates that two events are happening at the same time. It is often used to show a contrast or a comparison between the two events. Here are the examples:

'Until' and 'by the time' are used to indicate the time up to which an action or event occurs.
'Until' is used to indicate the point in time up to which an action or event occurs. 'By the time' is used to indicate the point in time at which an action or event is expected to be completed. Here are the examples:

'Since' is used to refer to a point in time in the past from which an action or event began and continues to the present. It can also be used to indicate that an action or event started at the same time as another event. Here are a few examples:

'As' is used to indicate that two events occur simultaneously. It is often used to show a comparison or a contrast between the two events. Here are the examples:

As long as is used to indicate the duration of time that an action or event occurs. Check out the examples for more clarification: