Hi! the question is not well formulated.
Indeed, see the "mi" position in the Italian example, not in English:
1. Mi dai un bicchiere d'acqua? (Do you give me a glass of water? )
2. Dammi un bicchiere d'acqua ! (Give me a glass of water ! )
As you can see, the pronoun "MI" can stand both before and after the verb.
La distinzione sta nell'accento forte (o "tonico") oppure debole (o "atono").
Esempio di pronome con accento tonico, forte: Chiama me.
Esempio di pronome con accento debole, atono: Chiamami.
The distinction in accent is strong (or "tonic") or weak (or "unstressed").
Example of pronoun with tonic accent, loudly: Chiama me.
Example pronoun weak accent, unstressed: Chiamami.
I understand that it is difficult in theory; if you hear about and if you contextualizes it, then it becomes easier.
Cinzia