A mi abuelo nunca le ha gustado el bigote largo, así que siempre lo lleva corto.

Because with gustar, the person who experiences the liking is normally shown twice:

• as an indirect object pronoun: le
• and often also as an a phrase for clarity or emphasis: a mi abuelo

So A mi abuelo nunca le ha gustado... literally works like To my grandfather, ... has never been pleasing.

In Spanish, the pronoun le is the core grammar here; a mi abuelo clarifies who le refers to.

That’s because gustar works differently from English to like.

In English:

• My grandfather is the subject.
• likes is the verb.
• long moustaches would be the thing liked.

In Spanish with gustar:

• the thing liked is the grammatical subject
• the person who likes it is an indirect object

So in this sentence:

• el bigote largo is the grammatical subject
• a mi abuelo / le is the person affected

A very literal version would be:

• Long moustache has never pleased my grandfather

That is why the structure looks reversed compared with English.

Le ha gustado is the present perfect: has liked / has ever liked.

Here, nunca le ha gustado means he has never liked it, with the idea continuing up to the present.

In Spain, the present perfect is very common for things connected to the present, including life experience up to now:

• Nunca le ha gustado = He has never liked it
• Le gustó would sound more like He liked it at a specific time in the past
• Le gusta would mean He likes it, but it doesn’t express the never up to now idea as clearly

So nunca le ha gustado is the natural choice here.

Because the subject of gustar here is singular: el bigote largo.

With gustar, the verb agrees with the thing liked, not with the person:

• El bigote largo nunca le ha gustado → singular
• Los bigotes largos nunca le han gustado → plural

So the singular form is correct because el bigote is singular.

Bigote means moustache in Spain Spanish.

So:

• el bigote largo = a long moustache / wearing the moustache long

In this sentence, it refers to the style of moustache length, not to one specific separate moustache as an object in the world.

Related words:

• bigote = moustache
• barba = beard

Spanish often uses the definite article with body parts, clothing, and personal appearance where English might use no article or a possessive.

So el bigote largo here is natural Spanish for talking about moustache style.

Compare:

• lleva el pelo corto = he wears his hair short
• lleva la barba larga = he wears his beard long

English often prefers his, but Spanish often uses el/la instead.

Así que means so, therefore, or that’s why.

It links the two ideas:

• He has never liked a long moustache,
• so he always wears it short.

It is a very common connector in everyday Spanish.

Here llevar means to wear or to keep something in a certain style or state.

So:

• lo lleva corto = he wears it short / he keeps it short

The parts are:

• lo = it, referring to el bigote
• lleva = wears / keeps
• corto = short

This is a very common pattern in Spanish:

• llevar el pelo largo = to wear one’s hair long
• llevar la barba corta = to wear one’s beard short

Because bigote is the direct object of llevar.

So:

• lo = direct object pronoun = it
• le = indirect object pronoun

In the first clause:

• le ha gustado
• le refers to my grandfather, the person affected by gustar

In the second clause:

• lo lleva corto
• lo refers to the moustache, the thing being worn short

So the pronoun changes because the grammatical role changes.

Because it describes the noun bigote, even though the noun itself has been replaced by lo.

So corto still agrees with bigote:

• bigote = masculine singular
• therefore corto = masculine singular

You see the same pattern in:

• Lleva el pelo largo = He wears his hair long
• La lleva corta = He wears it short, if la referred to something feminine like la barba

So corto is not describing how he wears it in an adverb sense; it describes what the moustache is like.

Yes, absolutely.

Both are natural:

• siempre lo lleva corto
• siempre lleva el bigote corto

The version with lo sounds natural because el bigote has already been mentioned, so Spanish avoids repeating it.

It works much like English:

• He always wears the moustache short
• He always wears it short

The second version is usually smoother once the noun is already clear.

Yes, but the grammar changes slightly.

In Spanish, if a negative word like nunca comes before the verb, you usually do not add no:

• Nunca le ha gustado...

If the negative word comes after the verb, then you usually need no:

• No le ha gustado nunca...

Both mean essentially the same thing:

• He has never liked...

So the sentence’s word order is normal and correct.

Because llevar is the normal verb for wearing hair, beard, moustache, clothes, glasses, etc. in a certain style.

So:

• llevar el bigote corto = to wear the moustache short

You may sometimes hear tener in related contexts, but llevar is more idiomatic when talking about someone’s chosen appearance.

Compare:

• Tiene bigote = He has a moustache
• Lleva bigote = He wears a moustache
• Lleva el bigote corto = He wears his moustache short

So llevar focuses more on appearance/style.

With gustar, mi abuelo is not the grammatical subject in the same way it would be with English like.

So Spanish naturally says:

• A mi abuelo le gusta...

not:

• Mi abuelo gusta... for this meaning

Starting with A mi abuelo also helps set the topic early: As for my grandfather...

If you wanted a more English-like structure with mi abuelo as subject, you would normally choose a different verb:

• Mi abuelo nunca ha llevado el bigote largo = My grandfather has never worn a long moustache

But with gustar, A mi abuelo... is the normal structure.