La vendeuse me donne un sachet pour les vis.

La vendeuse is the feminine form of le vendeur, meaning saleswoman or female shop assistant.

• le vendeur = a male salesperson
• la vendeuse = a female salesperson

French nouns often change form depending on gender. Here, the person doing the action is female, so vendeuse is used.

La means the and is the feminine singular definite article.

It is used because:

• vendeuse is a feminine singular noun
• the sentence refers to a specific saleswoman, not just any saleswoman

So:

• la vendeuse = the saleswoman
• une vendeuse = a saleswoman

Me means to me.

In French, object pronouns usually come before the verb, unlike in English.

So:

• La vendeuse me donne... = The saleswoman gives me...

Compare:

• English: gives me
• French: me donne

This is very normal in French:

• Il me parle = He speaks to me
• Elle me voit = She sees me

Donne is the form of the verb donner used with la vendeuse, which is third person singular.

The verb donner means to give. In the present tense:

• je donne = I give
• tu donnes = you give
• il/elle donne = he/she gives
• nous donnons = we give
• vous donnez = you give
• ils/elles donnent = they give

Because la vendeuse = she, the correct form is donne.

Un sachet usually means a small bag, packet, or little pouch.

It is not exactly the same as un sac:

• un sac = a bag in a general sense
• un sachet = a smaller bag, often for small items, food, screws, seeds, etc.

In this sentence, un sachet suggests a small bag for holding the screws.

Because sachet is a masculine noun in French, so it takes un.

• un = masculine a/an
• une = feminine a/an

So:

• un sachet = a small bag
• not une sachet

This is something learners usually just have to memorize with the noun.

Here, pour les vis means for the screws.

It explains the purpose of the small bag:

• the saleswoman gives me a small bag
• the bag is for the screws

So pour often means for in the sense of purpose, use, or destination.

Les vis means the screws. It refers to a specific set of screws that both speaker and listener can identify from the situation.

• les vis = the screws
• des vis = some screws

In a shop context, les vis probably refers to the screws being discussed or bought. So the sentence is not just about any screws in general, but those particular screws.

Because of the article les, which marks it as plural.

• la vis = the screw
• les vis = the screws

The word vis is spelled the same in singular and plural, so the article tells you the number.

Here, vis is the noun meaning screw, and it is usually pronounced vee.

So:

• la vis / les vis = pronounced like vee

Be careful: French spelling can be tricky, and some final consonants are silent. Even though vis ends in s, you usually do not pronounce it here.

In this sentence, the most natural meaning is for the screws, meaning the sachet is intended to hold them.

French pour can have several meanings depending on context, but here the purpose meaning is the best fit:

• un sachet pour les vis = a small bag for the screws

If French wanted to express because of the screws, it would normally use a different structure.

Yes, it is very normal.

The structure is:

• La vendeuse = subject
• me = indirect object pronoun
• donne = verb
• un sachet = direct object
• pour les vis = extra phrase explaining purpose

So the pattern is:

subject + object pronoun + verb + noun + prepositional phrase

That is a common French word order. The main thing that may feel unusual to an English speaker is that me comes before the verb.