Me ha gustado mucho la película.

Because gustar works differently from English to like.

In English, I am the subject: I liked the film.

In Spanish, with gustar, the thing that is liked is the grammatical subject, and the person who experiences that feeling is shown with an indirect object pronoun:

• me = to me
• te = to you
• le = to him/her/you
• nos = to us
• os = to you all
• les = to them/you all

So Me ha gustado mucho la película is structurally closer to:

• The film has pleased me a lot

That is why me appears.

Because ha agrees with la película, which is the grammatical subject.

Here is the structure:

• me = to me
• ha gustado = has pleased
• la película = the film

Since la película is singular, Spanish uses ha.

Compare:

• Me ha gustado la película = I liked the film
• Me han gustado las películas = I liked the films

So it is ha, not he, because the subject is not I.

The subject is la película.

That can feel strange to an English speaker, because in English the subject would be I. But with gustar, the subject is the thing that causes the feeling.

So in:

• Me ha gustado mucho la película

the parts are:

• me = indirect object, to me
• ha gustado = verb phrase
• la película = subject

A good test is to make it plural:

• Me han gustado mucho las películas

The verb changes to han because the subject is now plural.

Not exactly in how it behaves grammatically.

For learning purposes, it is usually translated as to like, but the structure is more like to please.

So:

• Me gusta la película = I like the film
• literally, something like The film pleases me

This helps explain why:

• me means to me
• the verb agrees with la película
• the word order may feel reversed compared with English

You usually translate it as I liked the film, but it helps to remember that the grammar is different.

Yes, you can move it.

Spanish often puts the subject after the verb with gustar, especially when the important information is the thing being talked about.

So these are all possible:

• Me ha gustado mucho la película.
• La película me ha gustado mucho.
• A mí me ha gustado mucho la película.

The version with la película at the end sounds very natural. It often feels like the speaker is giving the reaction first and naming the thing afterward.

Because mucho is used here to mean a lot.

• Me ha gustado mucho la película = I liked the film a lot

This is a very common pattern with verbs:

• trabajar mucho = to work a lot
• llover mucho = to rain a lot
• gustar mucho = to like a lot

Muy is used before adjectives and adverbs:

• muy buena = very good
• muy rápido = very quickly

So:

• Me ha gustado mucho = correct
• Me ha gustado muy = incorrect

This is about tense choice.

• Me ha gustado mucho la película = present perfect
• Me gustó mucho la película = preterite

In Spain, the present perfect is commonly used for a recent past action or something connected to the present, especially with time expressions like hoy, esta semana, esta tarde, etc.

So after just watching a film, a speaker in Spain might naturally say:

• Me ha gustado mucho la película

If the event is seen as more clearly finished and disconnected from the present, they might say:

• Me gustó mucho la película

In much of Latin America, the simple past gustó is often used in situations where speakers in Spain would prefer ha gustado.

No, not usually.

Me ha gustado mucho la película is already complete.

You can add a mí for emphasis, contrast, or clarity:

• A mí me ha gustado mucho la película.

This might mean something like:

• I really liked the film
• As for me, I really liked the film

Important: if you add a mí, you still keep me.

So:

• A mí me ha gustado mucho la película. = correct
• A mí ha gustado mucho la película. = incorrect

The verb would become plural, because the subject would be plural.

Compare:

• Me ha gustado mucho la película. = I liked the film.
• Me han gustado mucho las películas. = I liked the films.

Notice the changes:

• ha → han
• la película → las películas

The pronoun me does not change, because the person experiencing the feeling is still me.

Because Spanish usually uses an article with nouns in cases like this.

Here la película means the film, usually a specific film both speakers know about, or one that has just been mentioned or watched.

So:

• Me ha gustado mucho la película = I really liked the film

Without the article, película would sound wrong here.

Spanish uses articles more often than English, so learners often need time to get used to that.

No, that is not the normal way to say it.

That sentence treats gustar like a regular verb meaning to like, but standard Spanish does not work that way.

The natural structure is:

• Me ha gustado mucho la película

not:

• Yo he gustado mucho la película

A useful rule is:

• with gustar, do not think I like something
• think something is pleasing to me

That will help you build the sentence correctly.