Common Subordinating Conjunctions
after	even though	when
although	if	whenever
as	since	where
as if	so that	whereas
as though	though	wherever
because	unless	whether
before	until	while

Punctuating Subordinating Conjunctions

(1) Because I love films, I try to go to the movies once a month.

(2) I try to go to the movies once a month because I love films.

• Sentence (1) has a comma because the dependent idea comes before the independent idea.

Dependent idea	comma	Independent idea
Because I love films	,	I try to go to the movies once a month.

• Sentence (2) has no comma because the dependent idea follows the independent idea.

Independent idea	Dependent idea
I try to go to the movies once a month	because I love films.

Resource:

Fawcett, Susan and Alvin Sandberg. Grassroots: The Writer's Workbook Fourth

      Edition. Boston: Houghton Mifflin, 1991.