La profesora nos pidió una redacción sobre un viaje importante para nosotras.

Nos is the indirect object pronoun meaning to us.

So La profesora nos pidió... literally works like:

• La profesora = the teacher
• nos = to us
• pidió = asked / requested
• una redacción = a composition / essay

A very literal breakdown would be The teacher asked us for a composition or The teacher assigned us a composition.

With pedir, Spanish often uses this pattern:

• alguien pide algo a alguien
• someone asks someone for something

In the sentence, the a alguien part is represented by the pronoun nos.

Pidió is the preterite, which is used for a completed action in the past.

Here, the sentence is referring to one specific completed event: the teacher asked for the composition.

• pidió = she asked
• pedía = she was asking / used to ask / would ask

So:

• La profesora nos pidió... = the teacher asked us...
• La profesora nos pedía... would suggest a repeated action, a background action, or a more ongoing past situation.

In this sentence, pidió is the natural choice because it sounds like a single classroom instruction that happened once.

Because pedir is a stem-changing verb.

In many forms, the e in the stem changes to i:

• pido
• pides
• pide
• pedimos
• pedís
• piden

In the preterite, the third-person forms also show the change:

• pidió
• pidieron

So pidió is the correct él/ella/usted preterite form of pedir.

In a school context, una redacción usually means a written composition, short essay, or piece of writing.

It is a very common school word in Spanish. It often refers to the kind of writing assignment students do in class or for homework.

Depending on context, English translations might be:

• a composition
• an essay
• a written assignment

So in this sentence, the teacher is not asking for a formal research paper. It sounds more like a school writing task on a topic.

Because sobre is very commonly used to mean about when talking about the topic of a text, talk, book, or assignment.

So:

• una redacción sobre un viaje importante = a composition about an important trip

You may also hear acerca de, which also means about, but sobre is shorter and very common.

De can sometimes be used in similar situations, but here sobre is the most natural choice for the topic of the writing assignment.

In Spanish, adjectives usually come after the noun.

So:

• un viaje importante = an important trip

That is the normal order.

Sometimes adjectives can go before the noun, but that often changes the tone, emphasis, or meaning. With importante, the most neutral and natural order here is viaje importante.

Nosotras is the feminine plural form of we/us.

It is used when the group referred to is entirely female.

So this sentence suggests that the speaker is part of a group of girls or women, and the teacher asked them to write about a trip that was important for them.

• para nosotras = for us, all female
• para nosotros = for us, masculine or mixed group

If there is even one male in the group, standard Spanish normally uses nosotros.

Para nosotras tells us important to whom.

Compare these:

• un viaje importante = an important trip
• un viaje importante para nosotras = a trip that was important to us

Without para nosotras, the sentence would still make sense, but it would be less specific. The phrase explains that the trip was important from their perspective.

Also, after adjectives like importante, Spanish often uses para to say for whom something is important:

• Es importante para mí
• Es importante para nosotros
• Fue importante para ella

So para nosotras is very natural here.

Not really, if you want to keep the same meaning.

You could leave out the pronoun nos in nos pidió? No, because that pronoun is doing a grammatical job: it tells us to whom the teacher made the request.

You also would not normally drop nosotras from para nosotras, because then you would lose the idea of important to us.

Spanish often drops subject pronouns like yo, tú, or ella, but nos and nosotras here are not optional subject pronouns. They are part of the structure and carry important meaning.

Spanish often uses the definite article with professions or roles when talking about a specific person in a general identifying way.

So:

• La profesora nos pidió... = The teacher asked us...

This is completely normal Spanish.

If you were speaking to the teacher directly, you would not use the article like that:

• Profesora, tengo una pregunta

But when talking about her, la profesora is standard.

The accent marks show which syllable is stressed.

• pidió is stressed on the last syllable: pi-DIÓ
• redacción is stressed on the last syllable: re-dac-CIÓN

They are important because Spanish spelling uses accent marks to show pronunciation when a word does not follow the default stress pattern.

They are not optional in writing.

Grammatically, pedir means to ask for or to request.

But in a school context, La profesora nos pidió una redacción... often sounds very close to The teacher assigned us a composition... or The teacher asked us to write a composition...

So the basic verb is ask/request, but the natural English translation may be a little different depending on context.

That is very common when translating school-related Spanish into natural English.