Learn Hardcore Italian: La cassiera del supermercato mi sorride se acquisto molti prodotti. - The cashier at the supermarket smiles at me if I purchase many products.

del is a contraction of di + il, meaning of the (masculine singular). In Italian, prepositions like di, a, da, in, su merge with definite articles (il, lo, la, i, gli, le) to form contractions. So la cassiera del supermercato translates to the cashier of the supermarket.

Why is the noun cassiera feminine, and what would the masculine form be?

Italian nouns referring to people and professions typically change ending based on gender.

–a ending signals feminine singular: cassiera (female cashier)
–e ending signals masculine singular: cassiere (male cashier)
The accompanying definite article la matches the feminine noun.

Why is mi placed before sorride, and what does mi mean?

mi is the first-person singular indirect object clitic pronoun meaning to me. In Italian, clitic pronouns precede a simple finite verb. Thus, mi sorride literally means she smiles at me.

Could we say sorride a me instead of mi sorride, and is there any difference?

Yes, sorride a me is grammatically correct and sometimes used for emphasis or clarity. However:

Everyday speech prefers the clitic pronoun form (mi sorride).
a me is used when you want to stress at me specifically (e.g. non sorride a te, sorride a me).

What tense and mood is sorride, and why is it in that form?

sorride is the third person singular simple present indicative of sorridere. It describes a habitual or general action—here, the cashier typically smiles under certain conditions.

Why is acquisto in the present indicative after se instead of a subjunctive form?

In Italian conditional sentences:

se (if) + present indicative expresses a realistic or likely condition (protasis).
The result clause then uses the present/future/imperative.
Subjunctive is reserved for hypothetical or counterfactual situations after certain conjunctions, not for real “if” clauses.

What’s the difference between se and quando in this context, and can quando be used?

se = if, introduces a condition that may or may not happen.
quando = when, implies certainty that the event will happen.
Use se if you want to express possibility. Use quando if you assume you will definitely buy many products and then the cashier will smile.

How does the adjective molti agree with prodotti, and could the adjective come after the noun?

molti is a masculine plural adjective meaning many. It agrees in gender and number with prodotti (masculine plural).

Typical order: molti prodotti.
Post-nominal placement (prodotti molti) is grammatically possible but marked or poetic.

Can the if clause (se acquisto molti prodotti) come at the beginning of the sentence, and does that change punctuation?

Yes. Starting with the subordinate clause is common:
Se acquisto molti prodotti, la cassiera del supermercato mi sorride.
When the se-clause comes first, you should place a comma before the main clause.

Are there alternative words or synonyms I could use instead of acquistare and molti?

Yes. For acquistare (to buy):

comprare (more colloquial, everyday speech)
fare acquisti (to do shopping)
For molti (many):
tanti (more informal, interchangeable here)
numerosi (more formal).
Example: La cassiera del supermercato mi sorride se compro tanti prodotti.