Conjunctions signal different types of relationships in a sentence.  In order to interpret longer sentences, a good reader must understand the meaning of various phrases and clauses and how they relate to one another. 

 

Adding Information	To show a cause or provide a reason	Contradiction or reversal	Time Sequence	Provide a condition or a choice
and	because of  or (because) in order that so	but or although however nevertheless even though yet regardless of	then now next finally as soon as before since until whenever while when	either-or if-then unless since