"puis-je aller à mon placard" (or "est-ce que je peux aller ...") means "May I go to my cupboard / locker" in French.
dans mon placard means 'in my cupboard' in English.
The cast of Mon placard - 1998 includes: Barbara Tissier
I can go a' my locker
"My heart will go onto" is the French translation of "Mon coeur va aller sur". If you intended to say "my heart will go on", that would be "mon coeur continuera"
The cast of Un cafard dans mon placard - 2006 includes: Abigail Burn as The daughter Jacqui Dawson as The mother Robert Hitchmough as The father
tu dois aller à la banque
j'aime aller sur mon trempoline
Both. In contrast to the singular possessive adjectives which change form according to gender (mon/ma, ton/ta, son/sa), the plural ones do not (notre, votre, leur). So, mon placard, ma fleur and notre placard, notre fleur are all correct.
The cast of Les reanimations - 2006 includes: Barbara Tissier as (segment: Mon placard)
Tu pourrais aller à Mahalapye aujourd'hui, mon frère.
mon
What does mon mean