Pronouns are used when you get tired of repeating nouns. There are many different types of French pronouns – try these links for detailed lessons and examples of each type.
At first glance, adjectives and pronouns might seem to have very little in common, since adjectives are used with nouns, while pronouns replace nouns. But there is an interesting relationship that can help you use both parts of speech more effectively: there are six French adjective / pronoun pairs, where an adjective + noun can be replaced by a corresponding pronoun.
Some French verbs do not allow their indirect objects to be replaced by pronouns; instead, the preposition must be maintained after the verb along with the indirect object.
As you might guess from their name, adverbial pronouns are caught between two worlds: they are pronouns in the sense that they replace nouns, and at the same time they are adverbs representing a place, a quantity, or the object of a proposition. French has two adverbial pronouns: en and y.
Grammatical agreement is a vast topic - and one of the banes of French students. While in English we have a few pronouns and adjectives that indicate gender and number (e.g., he/him/his and she/her/hers), in French, agreement is found in 5 of the 8 parts of speech.