What is the difference between aller and vas?

What is the difference between these two sentences?

Il parle à Marie.
Il parle de Marie.

The difference between "aller" and "vas" lies in the conjugation and usage. "Aller" is the infinitive form of the verb "to go" in French, while "vas" is the second-person singular form of the verb. So, "aller" is used to talk about the action of going in general, whereas "vas" specifically refers to the action of going by the second-person singular pronoun "tu" (you).

To understand the difference between the two sentences "Il parle à Marie" and "Il parle de Marie," we need to look at the prepositions used in each sentence.

"Il parle à Marie" means "He is speaking to Marie." In this sentence, the preposition "à" (to) indicates the direction or target of the action of speaking. It shows that the person speaking is addressing or having a conversation with Marie.

On the other hand, "Il parle de Marie" translates to "He is speaking about Marie." In this sentence, the preposition "de" (about) indicates the topic or subject of the conversation. It implies that the person speaking is discussing or mentioning Marie.

So, the difference between the two sentences is that "Il parle à Marie" refers to speaking directly to Marie, while "Il parle de Marie" refers to speaking about Marie.