"Stare" non è come "Amare",
,● Normally when we indicate the group of verbs ending in "ARE" we use the verb "AM-ARE" as an example, we cut "ARE" by conjugating the present tense, like this.
Amare _ to love
_ Am-"o" / am-"i" / am-"a" / am-"iamo" / am-"ate" / am-"ano". (This is the rule.)
☆ However, there are some exceptions verbs that do not follow this rule. For example as the verbs "ANDARE" / "STARE" / "DARE" / "FARE".. are part of the irregular verbs.
_ Stare / to stay ; Sto /stai / sta / stiamo / state / stanno.
_ ANDARE / to go; Vado / vai / va / andiamo/ andate / vanno.
_ DARE / to give ; Do / dai / dà / diamo / date / danno.
_ FARE / to do; Faccio / fai / lui fa / facciamo / fate / fanno.
● Exactly .. In this case we talk about the imperative of the "Are" group. The forms of the imperative are those at the second singular person (TU) and plural (VOI) ..
● Most of the verbs that are irregular in the present indicative maintain the same irregularities in the imperative as well.
☆ Attention, however, there are some verbs that have irregular forms, different from the present indicative.?!
● The irregular forms of the second person singular of the verbs in "ARE" are the verbs; ("andare, dare, fare e stare") the forms, "VAI" , "DAI", "FAI" , "STAI", are often used, as in the "present tense" instead of in place of the apostrophe forms.
_ and-are= va’ (vai) / andate
_ d-are= da’ (dai) / date
_ d-ire= di’ / dite
_ f-are= fa’ (fai) / fate
_ st-are= sta’ (stai) / state
_ av-ere= abbi / abbiate
_ ess-ere= sii / siate
_ sap-ere= sappi / sappiate
hope this helps..