Quan corregeix les meves respostes, també subratlla les paraules importants.

Catalan often leaves out subject pronouns because the verb ending already shows the person.

• corregeix = he/she/it corrects
• subratlla = he/she/it underlines

So Catalan does not need ell / ella unless you want emphasis, contrast, or extra clarity.

For example:

• Quan corregeix... = When he/she corrects...
• Quan ella corregeix... = When she corrects... with extra emphasis on she

This is very normal in Catalan and is one of the first things English speakers notice.

corregeix is the 3rd person singular present indicative of corregir.

So it can mean:

• he corrects
• she corrects
• it corrects
• sometimes you correct in the polite vostè form, depending on context

The ending -eix is common in many verbs of the -ir group in Catalan.

A few similar forms are:

• serveix = he/she serves
• decideix = he/she decides
• afegeix = he/she adds

So corregeix fits a very common pattern.

Because Catalan commonly uses the present tense after quan for actions that are habitual, repeated, or generally true.

In this sentence, the idea is something like a repeated action:

• Whenever he/she corrects my answers, he/she also underlines the important words

So the present tense works naturally.

This is similar to English in sentences like:

• When she corrects my work, she also explains the mistakes

Also, Catalan often uses the present after time words like quan even where English might sometimes think about future meaning.

Because Catalan usually uses the definite article + possessive + noun structure.

So:

• les meves respostes = my answers
• literally something like the my answers

This sounds strange in English, but it is normal in Catalan.

Other examples:

• el meu llibre = my book
• la teva casa = your house
• els nostres amics = our friends

Leaving out the article is possible in some special cases, but as a general rule, learners should expect:

article + possessive + noun

In this sentence, both instances of les are definite articles, not object pronouns.

• les meves respostes: les = the for a feminine plural noun
• les paraules importants: les = the for a feminine plural noun

This is important because Catalan also has a clitic pronoun les meaning them for feminine plural objects. But that is not what is happening here.

Here, les goes directly with the noun phrase:

• les meves respostes
• les paraules importants

So think of it as the article, not a separate pronoun.

They agree with the nouns they describe.

In Catalan, adjectives and possessives usually agree in gender and number with the noun.

Here:

• respostes is feminine plural
• paraules is feminine plural

So the words that go with them must match:

• meves = feminine plural of meu / meva / meus / meves
• importants = plural form of important

A quick breakdown:

• la meva resposta = my answer
• les meves respostes = my answers

And:

• la paraula important = the important word
• les paraules importants = the important words

So the endings are there because of agreement.

també means also or too.

In this sentence, it adds another action:

• first action: corregeix les meves respostes
• additional action: subratlla les paraules importants

So també tells you that the second action is added to the first one.

Its position before the verb is very natural in Catalan:

• també subratlla

That placement is common, although word order can shift for emphasis in some contexts.

Compare:

• També subratlla les paraules importants = He/she also underlines the important words
• Subratlla també les paraules importants = also possible, with a slightly different rhythm or emphasis

The comma separates the introductory quan clause from the main clause.

Structure:

• Quan corregeix les meves respostes = subordinate time clause
• també subratlla les paraules importants = main clause

So the comma helps show that the first part sets the time or condition for the second part.

In everyday writing, this comma is very common and helpful for clarity.

subratlla is the 3rd person singular present indicative of subratllar, meaning to underline.

So:

• subratlla = he/she underlines

It matches corregeix in person and tense:

• corregeix = he/she corrects
• subratlla = he/she underlines

This parallel structure is very typical and makes the sentence easy to follow:

• Quan corregeix..., també subratlla...

A pronunciation detail learners often notice: ll in Catalan is a special sound, traditionally like a soft ly sound, although pronunciation can vary by dialect.