Usage of Conjunction "so that and so as to" in adverbial clauses

[muditha]

Please explain the difference of conjunctions "so that" and "so as to"

[Tdol]

It depends whether you want to use a clause or a verb:
so that + clause
I arrived early so that I could have a word with him in private.
so as to + verb
We spoke quietly so as not to disturb them.

[muditha]

Thank you ,
Now usage of "so that and so as to" is clear to me.

muditha