EJEMPLOS

It is very important to know if a syllable is stressed (or not)

                                                  

For example
words	pronunciation	Syllables	Stressed syllable
PHO TO GRAPH		3	1st
PHO TO GRAPH ER		4	2nd
PHO TO GRAPH IC		4	3rd
PHO TO GRAPH I CALLY		5	3rd

In your dictionary, there are special symbols. A  ˈ shows where the stress is
PHO TO GRAPH	/ ˈfəʊ tə grɑ:f /
PHO TO GRAPH ER	/  fə ˈtɒ grəf əɼ /
PHO TO GRAPH IC	/ fəʊ tə ˈgræf ɪk /
PHO TO GRAPH I CALLY	/ fəʊ.tə ˈgræf.ɪ.kli /

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-76222.php