in the following words where is the stress?stress on the syllable - comfortable, fashionable, occasion and commercial?
You can find the stress in a word by pronouncing it aloud and/or checking a dictionary entry for the word.
Here's an example:
com•fort•a•ble /ˈkʌmf tə bəl, ˈkʌmf ər tə bəl/ Show Spelled Pronunciation [ˈkuhmf-tuh-buhl, ˈkuhm-fer-tuh-buhl]
http://dictionary.reference.com/browse/comfortable
The stress is on the first syllable in that word. What do you find for the others?