Conjunctions in adverbial clauses of reason

These clauses broadly answer the question Why? and can be introduced by the following conjunctions because as seeing (that) and since

As/Because/Since there was very little support the strike was not successful [compare since in time clauses > 1.45.1] / m afraid we don t stock refills for pens like yours because there's little demand for them

The relative position of clauses of reason and main clauses

As a general rule, whatever we want to emphasize (reason or main clause) comes at the end

We often begin sentences with as or since because the reasons they refer to may be known to the person spoken to and therefore do not need to be emphasized

As/Since you can't type the letter yourself you II have to ask

Susan to do it for you

Because generally follows the main clause to emphasize a reason which is probably not known to the person spoken to [see for > 1.20.5]

Jim s trying to find a place of his own because he wants to feel

Independent

Because can always be used in place of as since and for to give a reason or reasons, but these conjunctions cannot always be used in place of because

1.49 Adverbial clauses of condition[> chapter 14]

These clauses can be introduced by conjunctions such as assuming (that) if on condition (that) provided (that) providing (that) so'as long as and unless