I thought I understood this but now I read a couple of conflicting sentences; could you please check this and correct the errors?

1) je vois ma soeur
je LA vois

2) je vois mon frère
je LE vois

3) je parle avec ma soeur
je parle avec ELLE
je parle à ma soeur
je parle à ELLE
je LA parle (or "je LUI parle)?

4) je parle avec mon frère
je parle avec LUI
je LE parle (or "je lui parle")?

5) je parle avec toi
je TE parle (right)

I am sorry, I know this is pretty elementary but I think learning languages is like building a house;
gammar - in my opinion - is the foundation and the vocabulary the stories. I feel that unless you have a rock-solid foundation, you cannot make a tall building, because the foundation will not support many stories.
Merci en avance de votre aid!

3. Je lui parle. = I speak, do speak, am speaking TO HER (indirect-object pronoun)

5. je parle avec toi = je te parle = right = I speak, do speak, am speaking TO YOU.

Here's the problem with the French.

Je le/la/les vois = I see HIM/IT, HER/IT, THEM. (direct object pronouns.

Je lui/leur parle = I speak TO HIM, TO HER, TO THEM. (indirect-object pronoun)

When you see the English: I write him. you need to REWORD it to "I write (a letter, etc. = direct object) TO HIM (indirect-object pronoun.

If when you reword it you either say or have understood TO, FOR, AT, FROM you have a indirect-object pronoun.

I have review sheets but I suspect you don't really need them. Just let me know! :)

I used to tell my students in Level I: you are building a wall. You must have a firm foundation upon which you will build Level II. Then you need a firm foundation to build Level III. If you draw a well with GAPS, they quickly see how the wall falls down on the next level.

In fact, in Level V we used to look at the "hit list" (the mistakes they kept making) and there were NOT from Level IV or even III, but usually Level I OR Level II. In my book, Level II is the most important of all, because it reviews Level I and starting with Level III, you've had all the grammar. Then you put whatever you have to work! :)

Sra (aka Mme)

Thank you so very much!

1) je vois ma soeur

je LA vois

This sentence is correct. "La" is the direct object pronoun in the third person singular feminine form, used to replace "ma soeur" as the object of the verb "voir" (to see).

2) je vois mon frère
je LE vois

This sentence is also correct. "Le" is the direct object pronoun in the third person singular masculine form, used to replace "mon frère" as the object of the verb "voir".

3) je parle avec ma soeur
je parle avec ELLE
je parle à ma soeur
je parle à ELLE
je LA parle (or "je LUI parle)?

The correct sentence is "je parle avec elle". In this case, "elle" is used as the subject pronoun to refer to "ma soeur" and it stays the same when used as the object of the verb.

Additionally, "je parle à ma soeur" and "je parle à elle" are also correct, as they both mean "I speak to my sister" and "I speak to her" respectively. However, "je LA parle" and "je LUI parle" are not correct constructions in French.

4) je parle avec mon frère
je parle avec LUI
je LE parle (or "je lui parle")?

The correct sentence is "je parle avec lui". In this case, "lui" is the indirect object pronoun in the third person singular masculine form, used to replace "mon frère" as the object of the verb "parler".

"Je le parle" is incorrect, as "le" is used for direct objects, not indirect objects. "Je lui parle" would be correct if you were speaking to someone else about your brother, saying "I speak to him".

5) je parle avec toi
je TE parle (right)

This sentence is correct. "Te" is the second person singular (informal) object pronoun used to replace "toi" as the object of the verb "parler".

You have a good analogy comparing language learning to building a house. Grammar indeed forms the foundation, while vocabulary and other elements build upon it to create a solid structure. It's important to have a good understanding of grammar rules to effectively communicate in a language. Keep up the good work!