sa = her as in her thing, if the thing is feminine. (not female but classified as feminine in French grammar). Sa is talking about which thing. I see her thing. Je vois sa robe. Not my dress, not your dress, but her dress.
Since it is describing which dress, not who actually owns it, sa robe can also mean his dress. That is because sa is modifying the direct object of the verb not the connection of the dress to the subject of the sentence. Think of sa as an adjective in this case.
The ball hits the blue car.. ...The car is blue no matter what hits it.
He sees her dress/He sees his dress. .....The dress is seen no matter who sees it.
He sees her dress = Il voit sa robe. The dress is seen no matter who he or she is. Robe is feminine in French so its modifier must be as well.
la = her ...that person or thing standing right there, if it is grammatically feminine. La is a pronoun which replaces someone or something. I see her. Je la vois. Not him, not them, not me, not you but her.
-Connaître (infinitive): Used for either knowing a person or being familiar with something. Ex: Je le connais = "I know him"
-Savoir (infinitive): Used for knowing facts or how to do something. Ex: Je sais où il est = "I know where he is" (It's a fact that he is there)
Additionally, it looks like you know some Spanish; Connaître vs. Savior is exactly the same as Conocer vs. Saber in Spanish.
I think you meant to ask, "can't it be a fact that I know him?"
Perhaps it is a fact that you know somebody. Regardless, in French you would never use the verb savoir for knowing somebody; it will always be connaître.
"To know somebody" is really just an English expression. In English, we can use the verb "to know" in a variety of ways such as:<pre>
- "To perceive or understand as fact or truth" (similar to the use for savoir) - "To be acquainted with a person" (similar to the use for connaître)</pre>
These are two distinct uses for the verb "to know," and in French these two distinct meanings are represented by two different verbs.
"ça" is a demonstrative pronoun and the shortened version of "cela" = "that thing"
"la" is a personal pronoun and the object form of "elle".
Object personal pronouns are placed before the verb they depend on, but not demonstrative pronouns.
- je la connais = I know her/it
- je connais ça = I know that
Also, 'connaître' isn't necessarily the most appropriate verb, depending on what the antecedent of 'that' is. It could easily be 'connaître' or 'savoir'; whereas with 'her', 'connaître' is more justified (to use 'savoir' with a person as its object rarely makes sense, unless you're being poetic or something).
Feel the difference:
I - my - me = je - mon/ma - me
You - your - you = tu - ton/ta - te
he - his - him = il - son/sa - le
She - her - her = elle - son/sa - la
So, la - is object pronoun, but son/sa is like an adjective. Examples:
I know her - Je la connais.
It's her bag - C'est son sac.
Savoir (Je sais) - to know a fact.
Je sais qu'elle est ta mère. I know that she is your mother. (it's a fact).
Connaître (Je connais) - to know something by experience.
Je te connais - I know you; Je connais ce chemin - I know this way. ( It's my expierence) I hope it will help!
"connaître" means "to be familiar with" and used with places and people:
"je la connais" can mean "I know her" (la = a female living being) or "I know it" (a feminine place)
- do you know Mary? Yes, I know her = connais-tu Mary ? Oui, je la connais
- do you know this town? Yes I know it = connais-tu cette ville ? Oui, je la connais.
"se" is a reflexive pronoun that you use with "il, elle, on" when the verb is reflexive, that is when the subject and the object are the same person:
- elle se connaît = she knows herself
- je la connais = I know her ("la" is the object form of "elle")
- je le connais = I know him/it ("le" is the object form of "il")
"Lui" is necessary when the verb is constructed with the preposition "à":
- Parler à quelqu'un: "Je lui parle" (I talk to him/her)
"Connaître" is directly transitive, which means it does not need a preposition and therefore you have to use the direct object form of the pronoun, which is "le" (him) or "la" (her):
- Connaître quelqu'un: Je le/la connais (I know him/her)