What is the difference between always and forever? Are they synonyms used in different contexts or can they be used interchangeably?
In some contexts they mean the same, but differ syntactically...
I will always love you. I will love you forever. /not/ ?I will forever love you. 1
In other contexts there's a difference in that always usually means continuously, at all [relevant] times, whereas forever usually means for an infinite amount of time into the future. Thus...
He always catches the bus at 8am. /not/ *He forever catches the bus at 8am.
The universe may not last forever. /not/ ?The universe may not last always.
...where some people may find that last construction more acceptable than others.
1: The song I Will Forever Love You does exist, but it's nowhere near as well-known as I Will Always Love You, written and first recorded by Dolly Parton, massively popularised by the late Whitney Houston.
Always: This word can be used to refer to the current habit. Maybe it'll change or end in the future.
Forever: This word can be used to refer to the action which never ends in the future.
Always generally refers to ongoing things while forever is a definitive way of saying that something will never end.
- I always eat breakfast.
- People have been eating breakfast forever.
Yes, I'd agree that there exist some syntactical difference but always and forever are the same based on a certain context:
- The sun always rises from the east and sets in the west.
- The sun shall, forever rise from the east and set in the west.
From (1) although its evident always is of an ongoing event or habit , its also not clear or certain when the event or habit may stop, it carries, concerns there might be some exceptions, but when? Its not certain, what time? - "all the time" -hence always.
Whereas in (2) its more evidently pronounced that the said event or habit continues in the future and shall certainly not stop.
In the context above , I would say Always and Forever are the same , because all the time, perpetual without certainty means perhaps ,
the sun shall indeed for ever rise from the east and settle in the west.
Always transforms to forever at a point. Wherever always precedes a statement , forever is also intended for the future in most cases.