Question

you are excused. you have confessed your fault ( join into a single sentence using adverbial clues)

Answer 1

Original sentence:

You are excused. You have confessed your fault.

Sentence joined after using adverbial clause is as follows:

As you have confessed your fault, you are excused.

Adverbial clause is a word or a group of words that act as an adverb.

Adverbial clause generally defines an adjective, adverb or verb in a sentence and answers to questions such as where, how, why etc.  

Answer 2

As you have confessed your fault, you are excused.
:)