Je comprends mieux la conjugaison quand je lis les exemples à voix haute.

Because mieux is the comparative form of the adverb bien, while meilleur is the comparative form of the adjective bon.

Here, mieux modifies the verb comprends, so it tells you how you understand: I understand better.

• Je comprends mieux = I understand better
• C’est meilleur = It’s better

So in this sentence, mieux is the correct choice.

In French, abstract nouns are often used with an article where English might leave it out.

So la conjugaison means conjugation in a general sense, not necessarily one specific chart. French commonly says:

• j’aime la musique
• j’étudie la grammaire
• je comprends la conjugaison

English often drops the article in these cases, but French usually keeps it.

Because la conjugaison here refers to the subject area or concept of conjugation as a whole, not to individual conjugations.

It is similar to saying:

• I understand grammar better
• I understand pronunciation better

You are talking about the general topic, so the singular is natural.

Here quand means when, but in context it often has the sense of whenever or when I do this.

The sentence describes a general habit or repeated situation:

• Je comprends mieux la conjugaison quand je lis les exemples à voix haute.

That means something like: each time I read the examples aloud, my understanding improves.

So quand can work very naturally for repeated situations in French.

Lis is the je form of the verb lire, meaning to read, in the present tense.

The conjugation is:

• je lis
• tu lis
• il/elle lit
• nous lisons
• vous lisez
• ils/elles lisent

In je lis, the final s is silent. It is pronounced roughly like lee.

So:

• je lis sounds like zhuh lee

Because comprendre is a direct transitive verb in French. It takes a direct object without a preposition.

So you say:

• Je comprends la leçon
• Je comprends le problème
• Je comprends la conjugaison

English also says understand something, not understand to something, so the structure is similar here.

Literally, à voix haute means something like in a loud voice. But as a fixed expression, it means aloud.

French often uses this idiom after verbs of speaking or reading:

• lire à voix haute = to read aloud
• parler à voix haute = to speak aloud

It is just the normal French expression. You usually would not replace it with a more word-for-word English-style structure.

In French, short adverbs like bien, mal, mieux, beaucoup, and trop often come right after the conjugated verb.

So this is the most natural order:

• Je comprends mieux la conjugaison

Putting mieux later is not the usual neutral word order in this kind of sentence. A native speaker would normally place it after comprends.

Because the sentence refers to examples in general, and language learners usually read more than one example. French uses the plural naturally here:

• les exemples = the examples

It sounds more natural than singular in this context because the idea is that reading multiple examples helps with understanding conjugation.

Yes, usually there is a liaison between les and exemples because exemples begins with a vowel sound.

So les exemples is pronounced roughly like:

• lay-zayg-zahmpl

The s of les links to the following vowel and sounds like z.

That liaison is very common and natural in careful or normal speech.

Because the sentence describes a general truth or a repeated habit, not one single event happening right now.

French often uses the present tense for this kind of idea:

• I understand better when I read the examples aloud

This means in general, not necessarily at this exact moment.

So the present tense fits perfectly for both parts of the sentence.