After discussing reduced relative clauses and reduced adverb clauses of time, today we are going to learn the reduction of adverb clauses of reason.
Adverb clauses of reason are also called adverb clauses of cause and effect. They are introduced by conjunctions, such as because, now that, since, due to the fact that, and owing to the fact that. Like the other kinds of adverb clauses, they function as the dependent clause in a sentence.
(More on adverb clauses: https://englishtips4u.com/2011/10/13/engclass-adverbial-clause/)
The reduction of an adverb clause of reason to an adverbial phrase is only possible when its subject is the same as the subject of the main clause. Omit the conjunction, so that it is not included in the adverbial phrase, and change the verb to its –ing form.
Because she lives far from her family, Nancy does everything herself.
Living far from her family, Nancy does everything herself.
Having + past participle means because.
Because I have read the novel, I want to give it to you.
Having read the novel, I want to give it to you.
It is also possible to change be in an adverb clause of reason to being.
Because she was sick, she did not attend the class.
Being sick, she did not attend the class.
Betty Schrampfer Azar, Understanding and Using English Grammar: Third Edition