Depois da festa, eu tirei os brincos, guardei o anel e lavei o rosto.

Because da is the contraction of de + a.

• depois de = after
• a festa = the party
• depois da festa = literally after the party

In Portuguese, de often contracts with the definite article:

• de + o = do
• de + a = da
• de + os = dos
• de + as = das

So depois da festa is the normal, natural form.

Yes. In Brazilian Portuguese, you can say:

• Depois da festa, tirei os brincos, guardei o anel e lavei o rosto.

This is very natural because the verb endings already show that the subject is I:

• tirei
• guardei
• lavei

All of these are 1st person singular forms.

Including eu is also correct. It may be used for clarity, emphasis, or contrast:

• Eu tirei os brincos, não ela.
  (I took off the earrings, not her.)

So in this sentence, eu is optional.

They are in the preterite tense, which is used for completed actions in the past.

• tirar → tirei = I took off / I removed
• guardar → guardei = I put away / I stored
• lavar → lavei = I washed

This tense is used because the sentence describes actions that were finished after the party.

This is a spelling change used to keep the pronunciation consistent.

The verb is tirar. In the preterite:

• eu tirei
• você tirou
• nós tiramos

If Portuguese wrote tirai, the g sound is not relevant here—but the issue is with the consonant before e. For verbs ending in -car, -gar, and -çar, spelling changes happen clearly; with tirar, what you see is simply the regular -ei ending for eu in the preterite of -ar verbs:

• lavar → lavei
• guardar → guardei
• tirar → tirei

So tirei is just the normal eu preterite form of an -ar verb.

Portuguese uses definite articles much more often than English.

So where English might say:

• I took off earrings
• I put away a ring
• I washed my face

Portuguese often says:

• tirei os brincos
• guardei o anel
• lavei o rosto

The articles help make the sentence sound natural and specific.

A few notes:

• os brincos = the earrings
• o anel = the ring
• o rosto = the face

Even when English would prefer my face, Portuguese commonly uses the face when the owner is obvious from the context.

Because Portuguese often uses the definite article instead of a possessive with body parts, especially when it is obvious whose body part it is.

So:

• lavei o rosto = literally I washed the face
• but it naturally means I washed my face

This is very common in Portuguese:

• Escovei os dentes. = I brushed my teeth.
• Lavei as mãos. = I washed my hands.
• Machuquei o braço. = I hurt my arm.

You can say meu rosto, but it is usually less natural here unless you want emphasis or contrast.

Yes, in this context tirar os brincos means to take off/remove the earrings.

The verb tirar is very broad and can mean:

• take out
• remove
• take off
• pull out
• sometimes even get or obtain, depending on context

Here, because the object is brincos (earrings), the natural meaning is take off.

Examples:

• Tirei os sapatos. = I took off my shoes.
• Tirei o livro da mochila. = I took the book out of the backpack.

Here guardei o anel means something like:

• I put away the ring
• I put the ring somewhere safe
• I stored the ring

Guardar often means keeping something in a safe or proper place.

Examples:

• Guardei as chaves na gaveta. = I put the keys away in the drawer.
• Guarde seu celular. = Put away your phone.
• Vou guardar isso para depois. = I’ll save this for later.

It does not usually mean watch over in this kind of sentence. Here it is about placing the ring somewhere.

Portuguese often lists actions with commas and uses e only before the last item, just like English can do.

So this structure is very normal:

• tirei os brincos, guardei o anel e lavei o rosto

This is the same idea as:

• I took off the earrings, put away the ring, and washed my face.

You could technically repeat e, but it would sound heavier and less natural in many contexts.

Yes. One eu can govern all the verbs in the sequence:

• eu tirei
• (eu) guardei
• (eu) lavei

Portuguese does not need to repeat the subject if it stays the same.

So the full underlying structure is:

• Depois da festa, eu tirei os brincos, eu guardei o anel e eu lavei o rosto.

But repeating eu would usually sound unnecessary unless you want emphasis.

Not exactly, though they overlap.

• rosto = face, often a bit more neutral or standard
• cara = face, but also guy in many contexts; can sound more informal
• face exists in Portuguese too, but it is less common in everyday speech for this meaning and can sound more formal or technical

So lavei o rosto is a very natural and standard way to say I washed my face.

The original sentence is already natural. In casual speech, a Brazilian speaker might simply drop eu:

• Depois da festa, tirei os brincos, guardei o anel e lavei o rosto.

In speech, the rhythm would also help group the actions naturally. A person might also say:

• Depois da festa, eu tirei os brincos, guardei o anel e lavei o rosto.

Both are good. The version with eu is slightly more explicit; the version without it is very common in everyday Brazilian Portuguese.