Word order

I'm on level 2 and trying to get my head around pronoun order. This sentence sums up some of my confusion "Je vous ai rajouté un peu d'huile et j'ai gonflé vos pneus." Why does the vous go before the verb in the first phrase of the sentence, but vos goes after the verb in the second phrase? Anyone who can help, I'd really appreciate it. 

Louise,

Short answer: vos isn't a pronoun. It's a possessive adjective, (vos pneus == your tires) and they always precede the noun that they refer to. Shouldn't be any confusion here since none of them resemble any type of pronoun (except the length). Do a search for a list of them. It's very important that you commit them to memory.

Pronouns normally do go before verbs unless, for example, they're stress pronouns used after prepositions. i.e., je le fais pour elle. (I'm doing it for her).

Robert

Hi Robert, that's brilliant. Thank you!

Louise 

I'm glad that cleared it up for you, Louise. Also be careful with possessive pronouns. Some of them do resemble possessive adjectives, and they occur in sentences like the nouns they replace, as opposed to, the other types of pronouns that are generally placed before verbs.

Example:

j'aime son (poss. adj.) manteau, mais j'aime la couleur du sien (poss. pronoun).

(i like her coat, but i like the color of his.)

Robert