When is the letter i accented in the conjugated verb enviar (present tense)?

In the present tense the conjugations for "enviar" are:

Yo envío

el/ella envía

Tu envías

Ellos envián

Nosotros enviamos

Ustedes envían

So the i is accented in every case but in the conjugation for "nosotros", where the accented letter would be the "a"

the ecuadorians are more hard working people and word from early sun raise until sunset. then you join with family for dinner and talk about their day. while in america it’s different. everyone live and have different rules and traditions habits.