Ir a + infinitive.
The relative pronoun "quien" is used only to refer to people, and has a plural form "quienes". (There is no masculine/feminine distinction.) Mi tío, quien es.

tener conjugation subjunctive

tener conjugation subjunctive

Past Participle.

tengan - Wiktionary.

Irregular Verbs: Estar, Ir, Dar.
Future Perfect.

Tener Cuidado + Subjunctive? - Spanish language learning forums.

The relative pronoun "quien" is used only to refer to people, and has a plural form "quienes". (There is no masculine/feminine distinction.) Mi tío, quien es.
When this occurs, the first verb is conjugated, while the second verb remains in the. One such expression combines the verb ir (conjugated) with an infinitive.
The Conditional, Conditional Perfect, and “If” Clauses in Spanish.

Subjunctive: Part Five.