One word can only have one stress.
Only vowels can be stressed. (a, e, i, o, u)
There are other rules to word stress but most have exceptions. It is better to simply be aware of the concept and try to hear the stress each time you listen to English.
If you use word stress in your speech, you will instantly improve your pronunciation and listening comprehension. These tables give you some general guidelines.
|NOUN||Most two-syllable nouns have stress on the first syllable||PRES-ent, EX-port, IM-port,
|ADJ||Most two-syllable adjectives have stress on the first syllable||PRES-ent, GEN-tal, O-pen,
|VERB||Most two-syllable verbs have stress on last syllable||pre-SENT, ex-PORT, im-PORT, es-CORT|
|NOUN||For compound nouns, the stress is on the first part||BLACK-board, BLUE-bird|
|ADJ||For compound adjectives, the stress is on the second part||bad-TEMP-ered, old-FASH-ioned,
|VERB||For compound verbs, the stress is on the second part||un-der-STAND, o-ver-FLOW,|