A single sentence can assert more than a single proposition. The
easiest way of combining propositions within a single sentence is
to use a conjunction.
Many conjunctions assert a specific relationship between
Conjunctions like "because," "whenever,"
and "so that" assert a relationship of dependence.
Conjunctions like "after," "before," "since," "when," "while,"
and "where" assert a relationship of time or place.
Conjunctions like "but," "although," and "even though"
assert a relationship of contrast or seeming opposition.
In all these cases, the conjunction combines component
propositions into a statement in which all components
are being asserted as true.