AAAWWUBBIS

AAAWWUBBIS is an acronym for a group of subordinating conjunctions: Although, After, As, When, While, Until, Because, Before, If, Since.

A subordinating conjunction is a word that connects a dependent clause to an independent clause, showing the relationship between them.

Although it was raining, we decided to go for a walk.

'Because' is used to introduce a reason or explanation for something.

If it snows tomorrow, we will build a snowman.

'Unless' means 'except if' and is used to introduce a condition that must be met.

Since it was my birthday, we had a party.

The correct punctuation is: I missed school because I was sick.

If a sentence starts with a subordinating conjunction, it should be followed by a comma before the main clause.

An independent clause can stand alone as a complete sentence, while a dependent clause cannot stand alone and needs an independent clause.