Sigo sin encontrar mi delantal, así que hoy cocino con una camiseta vieja.

Seguir + sin + infinitive is a very common structure in Spanish. It means to still keep not doing something or more naturally to still not be able to / still not do something.

So:

• sigo = I continue / I still am
• sin = without
• encontrar = to find

Together, sigo sin encontrar mi delantal means I still can’t find my apron or I still haven’t found my apron.

It is more natural in Spanish than trying to say something like I continue not finding.

Both are possible, but they express slightly different things:

• No encuentro mi delantal = I can’t find my apron / I’m not finding my apron
• Sigo sin encontrar mi delantal = I still can’t find my apron

The version with sigo sin adds the idea that this problem has been continuing for some time. It highlights persistence: you have been looking, and the apron still has not appeared.

It comes from the verb seguir (to continue, to follow), which is irregular in the yo form:

• yo sigo
• tú sigues
• él/ella sigue
• nosotros seguimos
• vosotros seguís
• ellos siguen

A learner often expects sego, but that is incorrect. The correct first-person singular is sigo.

Because encontrar means to find, while buscar means to look for.

So:

• Busco mi delantal = I’m looking for my apron
• No encuentro mi delantal = I can’t find my apron
• Sigo sin encontrar mi delantal = I still can’t find my apron

In this sentence, the speaker is talking about the result, not just the action of searching.

Spanish often uses possessives like English does when talking about personal belongings:

• mi delantal = my apron

Using el delantal would mean the apron, which is possible only if the context already makes it clear whose apron it is.

Here, mi delantal sounds natural because the speaker is referring to their own apron specifically.

Yes. Delantal is the normal and very common word in Spain for apron.

In other Spanish-speaking regions, you may also hear other words, but for Spain Spanish, delantal is the standard and safest choice.

Así que means so, therefore, or as a result.

In the sentence:

• Sigo sin encontrar mi delantal, así que hoy cocino con una camiseta vieja.
• I still can’t find my apron, so today I’m cooking in an old T-shirt.

It introduces the consequence of the first idea.

This is different from porque, which means because and introduces the reason.

Compare:

• No encuentro mi delantal, así que cocino con una camiseta vieja.
  = I can’t find my apron, so I cook in an old T-shirt.

• Cocino con una camiseta vieja porque no encuentro mi delantal.
  = I cook in an old T-shirt because I can’t find my apron.

Because in Spanish, con can describe what someone has on or what they are equipped with, not just a tool.

So cocino con una camiseta vieja naturally means I’m cooking wearing an old T-shirt.

It does not usually suggest that the T-shirt is being used as an instrument. Context makes the meaning clear: if you cannot find your apron, you cook wearing an old T-shirt instead.

In Spanish, most descriptive adjectives normally come after the noun:

• una camiseta vieja = an old T-shirt
• un delantal blanco = a white apron

Putting vieja after the noun gives a straightforward descriptive meaning: the T-shirt is old.

If you put the adjective before the noun, it can sometimes sound more literary, subjective, or emphatic. For everyday speech, una camiseta vieja is the normal order.

Yes, but it is not exactly the same in tone.

• una camiseta vieja = a T-shirt that is old
• una vieja camiseta = often more expressive, like an old worn-out T-shirt or that old T-shirt

With viejo/vieja, position can sometimes affect nuance. After the noun, it is usually plain description. Before the noun, it can sound more emotional, familiar, or stylistically marked.

In this sentence, una camiseta vieja is the most neutral and natural choice.

Hoy means today, and it helps show that this is the solution for this specific occasion:

• hoy cocino con una camiseta vieja = today I’m cooking in an old T-shirt

Without hoy, the sentence could sound more general, as if this were a usual habit. With hoy, it clearly sounds like a temporary situation caused by not finding the apron.

Spanish often uses the simple present where English might prefer the present continuous.

So hoy cocino con una camiseta vieja can naturally mean:

• today I’m cooking in an old T-shirt

You could say hoy estoy cocinando con una camiseta vieja, but that would put more emphasis on the action being in progress right now.

The simple present is very common for current or near-current situations in Spanish.

Yes: Yo sigo sin encontrar mi delantal, así que hoy cocino con una camiseta vieja.

But in Spanish, subject pronouns are often omitted because the verb already shows the subject:

• sigo already tells us it is I
• cocino already tells us it is I

Adding yo is usually only done for emphasis, contrast, or clarity. The version without yo sounds more natural in most contexts.