Si veo una oferta buena, miro la fecha de caducidad antes de meter nada en la cesta.

Because si means if, and that word never has an accent.

Compare:

• si = if
• sí = yes

So in Si veo una oferta buena..., si introduces a condition: If I see a good deal...

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

Here:

• veo = I see
• miro = I look / I check

So yo is unnecessary unless you want emphasis or contrast.

• Si yo veo... would sound more emphatic, like If I see...
• In normal speech, Si veo... is more natural.

This sentence is using the present tense to describe a habit or general routine.

So it means something like:

• If I see a good offer, I check the expiry date before putting anything in the basket.

It is not just about one specific future moment. It describes what the speaker usually does.

Spanish often uses:

• si + present, present for habits and general truths

Example:

• Si tengo tiempo, voy al gimnasio.
• If I have time, I go to the gym.

Because after si meaning if, Spanish normally uses the indicative, not the subjunctive, when the condition is real, possible, or neutral.

So:

• Si veo una oferta buena... = If I see a good deal...

That is a normal, realistic condition.

Spanish does not usually say:

• Si vea... ❌

With si, the subjunctive generally does not appear in this kind of condition. Instead, Spanish uses structures like:

• Si veo... = present condition
• Si viera / si viese... = more hypothetical
• Si hubiera visto... = past unreal condition

This is a very common question.

• ver = to see
• mirar = to look at / to check

So:

• Si veo una oferta buena = If I see a good deal
• miro la fecha de caducidad = I look at / check the expiry date

In other words, first the speaker notices the offer, then checks the date.

English often uses see and look at in a similar way.

Yes, una buena oferta would also work, and many learners will find it more familiar.

In Spanish, adjectives often come after the noun:

• una oferta buena

But they can also come before the noun:

• una buena oferta

The position can slightly change the nuance:

• una oferta buena = a deal that is good, more descriptive
• una buena oferta = a good deal, often more natural and more general

In everyday Spanish, especially in speech, una buena oferta may sound more idiomatic to many people. But una oferta buena is understandable and grammatically possible.

In a shopping context, oferta usually means:

• special offer
• deal
• discounted item
• promotion

So here una oferta buena is not just any abstract offer. It means a good bargain or good supermarket deal.

In Spain, if you are shopping, oferta is a very common word for something on sale.

La fecha de caducidad means the expiry date or use-by date.

Breakdown:

• fecha = date
• caducidad = expiry / expiration

In Spain, this is the normal phrase you see on food packaging and similar products.

A learner should also know that Spain often distinguishes between:

• fecha de caducidad = use-by date, especially for products that should not be consumed after that date
• fecha de consumo preferente = best-before date

So fecha de caducidad is a very practical, everyday supermarket phrase.

Because after antes de, Spanish uses an infinitive when the subject stays the same.

Here, the same person does both actions:

• miro la fecha de caducidad
• meter nada en la cesta

So Spanish uses:

• antes de + infinitive
• antes de meter nada en la cesta

This is like saying:

• before putting anything in the basket

If the subject changes, Spanish usually needs a full clause instead:

• Antes de que lo metas en la cesta...
• Before you put it in the basket...

Both can be possible in some contexts, but meter is very natural here because it suggests putting something into/inside something.

• meter algo en la cesta = put something into the basket
• poner algo en la cesta = put something in the basket

In Spain, meter is very common in everyday speech for this kind of action, especially when talking about putting items into a bag, basket, drawer, pocket, trolley, etc.

So meter nada en la cesta sounds very normal and colloquial.

Because in Spanish, nada can mean anything in certain contexts, not only nothing.

Here, antes de meter nada en la cesta means:

• before putting anything in the basket

This is common after expressions like:

• sin
• antes de
• in some questions and condition-like contexts

Compare:

• No compro nada. = I don’t buy anything / I buy nothing.
• Antes de decir nada... = Before saying anything...

So although nada often gets introduced as nothing, in real Spanish it very often corresponds to English anything.

Because meter normally goes with en when you mean putting something inside a place or container.

So:

• meter algo en la cesta = put something into the basket

En focuses on the result: the item ends up in the basket.

Using a here would not be the normal choice with meter.

Yes, it sounds very natural for Spain.

In a supermarket context:

• cesta = basket
• carrito = trolley / shopping cart

So meter nada en la cesta suggests you are shopping with a basket rather than a trolley.

This is good everyday Spain Spanish vocabulary. In other varieties of Spanish, the exact shopping word may vary, but cesta is perfectly standard and clear.