If the two ideas have unequal importance, save the most important one for the end of the sentence so that your reader remembers it best. <quote : http://www.chompchomp.com/terms/subordinateclause.htm >
Rhonda gasped when a six-foot snake slithered across the sidewalk.
Generally, introductory information comes at the beginning and new or key information comes at the end , where sentence stress usually resides. OCCASIONALLY, key information can be put at the beginning, but it only works when context has prepared the reader and when it is done as an unusual exception. John broke the car -- We know John; what is surprising is that he broke the car.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.