As long as or So long as?
As long as
Exemple : ‘’I am happy for you to stay for as long as you like.’’
"As long as" and "so long as" are both conjunctions with similar usages. "As long as" is used to refer to the intended duration of a plan or idea, most commonly referring to the future. It is always followed by the simple present tense.
So long as
Exemple : ‘’You can come with us so long as you arrive on time.’’
"So long as" is used as a synonym of "provided that" or "on the condition that."