We sometimes use for as a conjunction meaning ‘because’. We use it in very formal, and often literary, contexts:
E. g. Chasing the white stag through the forests, never catching it, of course, for it is a creature of legend.
Used to connect words of the same part of speech, clauses, or sentences, that are to be taken jointly.
E. g. Bread and butter.
Used before the second or further of two or more alternatives (the first being introduced by a negative such as ‘neither’ or ‘not’) to indicate that they are each untrue or each do not happen.
E. g. They were neither cheap nor convenient.
Used to introduce a phrase or clause contrasting with what has already been mentioned.
E. g. He stumbled but didn't fall.
Used to link alternatives.
E. g. A cup of tea or coffee.
But at the same time; but nevertheless.
E. g. The path was dark, yet I slowly found my way.
And for this reason; therefore.
E. g. It was still painful so I went to see a specialist.
Doubts on this article