Hola Sri !
happy to help you! You basically need to conjugate the verb " ir" and add the infinitive forms of the verbs.:
1. "I am going to go out for dinner" using ir + a + infinitive?
(Yo) Voy + a + salir +a + cenar
2 . How would you say "You are going to obey" using ir + a + infinitive?
Tu + vas +a + obedecer.
3. How would you say "I am going to lie" using ir + a + infinitive?
(Yo) Voy + a + mentir.
4 . How would you say "We are going to share" using ir + a + infinitive?
(Nosotros) Vamos + a + compartir.
Happy to help you with any other questions. I am a native Spanish speaker tutor. Or let me know if you need any lessons.
Lourdes D