> He walked quickly into the room. -> He quickly walked into the room. (Here "quickly" is used preverbally to emphasize the manner of walking.)
2. Giving an Order
> Be careful as you go down the stairs. -> Be down the stairs carefully. (Here, "down the stairs" is a prepositional phrase starting with a preposition, and the advice or order is given as an adverbial.)
3. Showing Reason or Cause
> He cried because he was hurt. -> He was crying because he was hurt. (Here "because" helps indicate the substance of the sentence. By moving it preverbally, we connect the painting to its reason.)
4. Conjunctions for Coordinating Clauses
> I went to the store, and I bought milk. -> I bought milk because I wanted it. (Here "because I wanted it" is used as an explanation but is arranged in a different order that removes the prepositional phrase.)
5. Semi-Modified Subordinate Clauses
> I knew that I was coming. -> That I was coming, I knew. (Here the cause-and-effect relationship is changed, and the sentence becomes a more casual recounting of the information with an emphasis on the effect (having knowledge) as the main clause and the reason (the action of coming) as indirectly managed with "That...I was coming" as a secondary emphasis.)