Many compound expressions are used as conjunctions. They are called compound conjunctions.
As well as
The manager as well as his wife attended the party.
John, as well as his younger brother, Martin is interested in skiing.
As soon as
The passengers got off the plane as soon as it landed.
The students started talking as soon as the teacher left the classroom.
As though / As if
She began to laugh as if she was crazy.
He speaks as though he knew everything.
The child began to cry as if she was beaten.
He will play the match even if his father forbids him.
I cannot tell you even if you are my best friend.
I shall lend you the money provided that you return it next month.
All of you can sit down here provided that you do not disturb others.
The boy told a lie so that he could escape punishment.
He started early so that he could reach the office early.
On condition that
I shall lend you my camera on condition that you return it by Sunday.
You can go and play on condition that you return by 6 pm.