To memorize the irregulars, remember last words, like -é, -emos, <span>-éis, -án. Connect normal irregulars with these words. Boom, you make a future tense irregular.
Estar+emos=estaremos
Vivir+é=viviré</span>
both verbs can be used
Explanation:
in spanish it
hay sol means there is sun
hace sol means its sunny