In French, what does agreement mean again?

Question

Cause for example I put down this:

Ils ont marches sur l'Avenue Champs-Elysees.

But there shouldnt be an S after marche because theres no agreement with avoir.

Could I please know what agreement means again?

Answer 1

marché (passé composé with avoir only has the past participle agree with a preceding direct object.) There is none here.......Eysées

Verbs conjugated with être have the past participle agree with the subject...
Ils sont allés (for girls = allées)
Elle est morte

With adjectives, agreement means the adjective has the same number (singular/plural) and gender (masculine/feminine) as the noun(s) modified
la maison blanche
les livres lourds (heavy)

With verbs, there is agreement of the proper ending, depending upon the subject
je finis
ils finissent

Above are 4 types of agreement.

Sra (aka Mme)

Answer 2

Okay so would agreement just be the endings?

Answer 3

I suppose you "could" say that! I just never thought of it in those terms!

Sra (aka Mme)

P.S. There are so many definitions for the word "agreement" but here's what I found when it refers to grammar:
correspondence in grammatical case, number, gender, person, etc., between syntactically connected words.

Answer 4

I like your definition better, thanks=)

And just if you'd like to know, the book I have is called C'est A toi! And it it Level 2.