En el supermercado, pongo el pan y el yogur en la cesta y luego reviso la fecha de caducidad.

En el supermercado means in the supermarket and shows location.

• en = in / at
• al = to the

So:

• En el supermercado... = you are already there, doing the action there.
• Voy al supermercado = I am going to the supermarket.

In this sentence, the speaker is describing what they do while inside the supermarket, so en is the correct choice.

In Spanish, subject pronouns are often omitted because the verb ending already tells you who is doing the action.

• pongo = I put
• pones = you put
• pone = he/she puts

So yo pongo is possible, but pongo is more natural unless you want emphasis or contrast:

• Yo pongo el pan, y tú coges la leche.

Without emphasis, Spanish usually leaves out yo.

Yes. It comes from poner (to put / to place), and the yo form is irregular:

• yo pongo
• tú pones
• él/ella pone
• nosotros ponemos
• vosotros ponéis
• ellos ponen

This is a common pattern with some verbs where the yo form adds -go, such as:

• tener → tengo
• hacer → hago
• salir → salgo

So pongo is something you simply need to learn as a fixed form.

Spanish uses definite articles more often than English does.

In English, you might say:

• I put bread and yogurt in the basket

But in Spanish, it is very natural to say:

• pongo el pan y el yogur en la cesta

Here, the articles refer to the specific items you are dealing with in that situation. Spanish often prefers the article where English might leave it out.

Normally, y changes to e before words that begin with an i sound:

• padre e hijo
• España e Italia

But yogur does not begin with an i sound. It begins with a y sound, roughly like yo-.

So you keep y:

• el pan y el yogur

This is why e is not used here.

Yes. La cesta means the basket, the kind you carry by hand.

In a supermarket, in Spain, you might also hear:

• la cesta = basket
• el carrito = trolley / shopping cart
• el carro = also used in some places, but carrito is very common

So the sentence specifically means the speaker is putting the items into a basket, not necessarily a wheeled cart.

Revisar means to check / examine / inspect, while mirar means to look at.

So:

• miro la fecha = I look at the date
• reviso la fecha = I check the date carefully

In this context, reviso is better because the speaker is checking whether the product is still good, not just glancing at it.

Literally, it means the expiry date or expiration date.

Breakdown:

• fecha = date
• de = of
• caducidad = expiry / expiration

So la fecha de caducidad is the date after which the product should not be consumed.

In Spain, you may also see fecha de consumo preferente, which is slightly different:

• fecha de caducidad = use-by / do not consume after this date
• consumo preferente = best before

That distinction is useful in real-life shopping.

It can mean either, depending on context.

Pongo, reviso are in the present tense, and in Spanish the present can describe:

1. A habitual action
   • When I’m at the supermarket, I put the bread...
2. An action happening right now
   • I’m in the supermarket right now, and I put the bread...

Without more context, the sentence can sound like a routine or a description of what the speaker typically does.

Luego means then / later / next. It naturally introduces the next action in a sequence.

So the structure is:

1. En el supermercado
2. pongo el pan y el yogur en la cesta
3. y luego reviso la fecha de caducidad

This is a very normal Spanish way to describe steps in order.

You could also say:

• después reviso la fecha de caducidad
• y después reviso la fecha de caducidad

These are very similar, though luego is often especially natural in spoken narration.

Because en la cesta tells you where the items are being put, and Spanish commonly places that kind of location phrase after the direct object.

So:

• pongo = I put
• el pan y el yogur = the things being put
• en la cesta = where I put them

This order is very natural:

• pongo el pan y el yogur en la cesta

You could move things around for emphasis in some contexts, but this is the most neutral word order.

In standard Spain pronunciation, two points often stand out:

• cesta: the ce is pronounced with the th sound of thin
• caducidad: the ci is also pronounced with that same th sound

So roughly:

• cesta ≈ THES-ta
• caducidad ≈ ka-du-thi-DAD

Also:

• yogur is commonly pronounced close to yo-GUR

Of course, pronunciation varies across the Spanish-speaking world, but those features are typical of Spain.