Giving Reasons
Adverb Clauses
Adverb clauses show cause and effect relationships. Adverb clauses can either begin a sentence, or end a sentence. If the adverb clause begins the sentence, place a comma after the adverb clause. No comma is necessary if the adverb clause finishes the sentence.
Because
An adverb clause with 'because' provides the reason for the action taken in the main clause. Adverb clauses with 'because' generally end a sentence. However, they can also begin a sentence.
Examples:
He isn't going to attend the training because he has already mastered the software.
She isn't going to speak at the conference because she believes in doing all social networking online.
Since
'Since' has the same meaning as 'because'.
An adverb clause with 'since' provides the reason for the action taken in the main clause. Adverb clauses with 'since' generally end a sentence. However, they can also begin a sentence.
Examples:
He feels it's not possible to communicate since his email box is overrun with spam.
George tracks every visitor's surfing habits since his website installs a spyware cookie in the user's browser.
Prepositions
Because of
Adverb cases beginning with 'because of' are followed by a noun or noun phrase. Adverb clauses with 'because of' generally end a sentence. However, they can also begin a sentence.
Examples:
Mr. Anderson has been liberated because of his ability to crack the basic code of the Matrix.
Anderson is able to alter the program because of copyleft agreements.
Due to
Adverb cases beginning with 'due to' are followed is followed by a noun or noun phrase. Adverb clauses with 'due to' generally end a sentence. However, they can also begin a sentence.
Examples:
"Due to its mass appeal, the viral video was cross posted millions of times."
"Due to the lack of memory available, we deleted the entire stack."