Well an adverb helps make the verb (an action) take place
An adjective helps describe a noun
A prepositional phrase helps describe an event or location.
1). We can combine sentences with AN ADJECTITVE if they are talking about the same noun
2). We can combine sentences with AN ADVERB if they are talking about the same action
3). We can combine sentences with A PREPOSITIONAL PHRASE if they are talking about the same location