Sentence Stress

Welcome to my daily rotating five !

Today I've decided to discover what is the "sentence stress" !
Why a such rotating five ? Because 3 months ago, I haven't any idea about what was this thing... but no matter, there's still time to learn !

www.englishclub.com is a website explaining how to get this sentence stress, I sum up what's interesting :

1. Most sentences have two types of word:
   • content words : They are the key words of a sentence that carry the meaning.
     • main verbs : SELL, GIVE, EMPLOY
     • nouns : CAR, MUSIC, MARY
     • adjectives : RED, BIG, INTERESTING
     • adverbs : QUICKLY, LOUDLY, NEVER
     • negative auxiliaries : DON'T, AREN'T, CAN'T
   
   
   • structure words : they are not very important words. They are small, simple words that make the sentence correct grammatically.
     
     • pronouns : he, we, they
     • prepositions : on, at, into
     • articles : a, an, the
     • conjunctions : and, but, because
     • auxiliary verbs : do, be, have, can, must


2. The time between each stressed word is the same.

Example :
I am a proFESsional phoTOgrapher whose MAIN INterest is to TAKE SPEcial, BLACK and WHITE PHOtographs that exHIBit ABstract MEANings in their photoGRAPHic STRUCture.


Well, it seems to be difficult enough... But now, I can't said I've never heard about this...