La profesora nos enseñó a distinguir entre un consejo útil y una crítica maleducada.

In Spanish, it is very common to use the definite article with professions when you are talking about a specific person:

• La profesora = the teacher
• El médico = the doctor

So La profesora here means the teacher or our/the teacher, depending on context.

If you say Es profesora, with no article, that means She is a teacher. After ser, professions usually do not take the article unless you are being more specific.

Nos means us.

So:

• La profesora nos enseñó... = The teacher taught us...

It is an indirect object pronoun here, showing who received the teaching.

Compare:

• Me enseñó = she taught me
• Te enseñó = she taught you
• Nos enseñó = she taught us

The accent mark shows both pronunciation and tense/person.

• enseñó = he/she taught or you (formal) taught
• enseño = I teach / I am teaching

So the accent is important because it changes the meaning.

Here, enseñó is the preterite form of enseñar, meaning a completed action in the past: taught.

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

• La profesora nos enseñó... = the teacher taught us / the teacher showed us

This suggests a finished event or lesson.

Enseñaba is the imperfect, which would suggest an ongoing, repeated, or background action:

• La profesora nos enseñaba... = the teacher used to teach us / was teaching us

So in this sentence, enseñó sounds like a specific completed act of teaching.

Because enseñar a + infinitive means to teach someone how to do something.

So:

• enseñar a distinguir = to teach how to distinguish
• enseñar a leer = to teach to read
• enseñar a cocinar = to teach to cook

This is a very common pattern in Spanish:

• Nos enseñó a nadar. = She taught us to swim.
• Me enseñaron a conducir. = They taught me to drive.

Because after enseñar a, Spanish normally uses an infinitive to express the action being learned.

• Nos enseñó a distinguir...
• literally: She taught us to distinguish...

This works much like English to distinguish after taught us.

Entre ... y ... means between ... and ....

So:

• distinguir entre A y B = to distinguish between A and B

In this sentence:

• entre un consejo útil y una crítica maleducada
• between useful advice and rude criticism

This is a very standard structure in Spanish.

In this sentence, consejo means advice.

That can be confusing because English speakers may mix up:

• consejo = advice
• concejo = council (less common word, different spelling)

So here:

• un consejo útil = a useful piece of advice

Even though advice is usually uncountable in English, Spanish often uses un consejo for a piece of advice.

Útil is an adjective that does not change form for masculine and feminine in the singular.

So you get:

• un consejo útil
• una idea útil

The adjective stays útil in both cases.

In the plural, it becomes:

• consejos útiles
• ideas útiles

So the only change is usually in the plural form: útiles.

Here, crítica is a noun meaning criticism.

So:

• una crítica = a criticism / a critical comment

Be careful, because crítica can also relate to the adjective critical, depending on context, but in this sentence it is clearly a noun because it comes with una.

So:

• una crítica maleducada = a rude criticism
• una película crítica would be something different, where crítica would relate to being critical

Because crítica is a feminine noun, and the adjective must agree with it.

• una crítica maleducada
• un comentario maleducado

Spanish adjectives usually agree in gender and number with the noun they describe.

So here:

• crítica = feminine singular
• maleducada = feminine singular

Yes, literally it comes from the idea of being badly brought up or badly educated, but in normal usage it usually means:

• rude
• ill-mannered
• impolite

So in this sentence, una crítica maleducada means a criticism that is rude or disrespectful, not simply intellectually wrong.

This is a very common word in Spain.

In Spanish, adjectives are very often placed after the noun.

So:

• un consejo útil
• una crítica maleducada

That is the normal order.

Sometimes adjectives can come before the noun, but that often changes the nuance or sounds more literary/emphatic. In this sentence, the basic post-noun position is the natural one.

No, that would sound incorrect.

With enseñar + an action, Spanish normally uses:

• enseñar a + infinitive

So the correct form is:

• nos enseñó a distinguir

The a is required in this structure.

It is pronounced roughly like dees-teen-GEER.

A few useful points:

• The gu in gui gives a hard g sound.
• The u is silent here.
• The stress falls on the last syllable: -guir

So distinguir is not pronounced with the u sounding out.

Yes, nos is in a very normal position: before the conjugated verb.

• La profesora nos enseñó...

With a fully conjugated verb, object pronouns usually go before the verb.

You could also attach pronouns to an infinitive or gerund in other structures, but not here in this exact form.

So this sentence uses the standard placement.

Usually not in this sentence.

Although crítica can sometimes refer to criticism in a broader sense, or even the field of criticism, the phrase una crítica maleducada strongly suggests a rude critical remark rather than a review.

If someone meant a rude review, context would usually make that clearer. Here the contrast with un consejo útil makes criticism the most natural interpretation.