Habla con su muñeco como si entendiera todo lo que dice.

Spanish often drops subject pronouns when they are not needed, because the verb ending already gives information.

• habla can mean he/she/it speaks or you speak (formal singular, usted)
• In a full sentence, context usually tells you who the subject is

So Habla con su muñeco... is perfectly natural without él/ella/usted.

Su means his, her, your (formal), or their, depending on context.

So su muñeco could mean:

• his doll
• her doll
• your doll (speaking formally to one person)
• their doll

Spanish su is more ambiguous than English his/her/their, so you often need context to know exactly whose doll it is.

Muñeco is the masculine form and muñeca is the feminine form.

• muñeco = male doll / toy figure
• muñeca = female doll

So this sentence specifically says muñeco, not muñeca. It could also refer more generally to a toy figure, depending on context.

In Spanish, when you mean to talk with someone/something, you usually use hablar con.

• hablar con alguien = to talk with someone
• hablar a alguien can exist, but it sounds more like to address someone or to speak to someone in a more one-directional way

Here, Habla con su muñeco suggests interaction, even if imaginary.

Como si means as if.

It introduces a comparison with something that is not presented as real, but imagined, hypothetical, or contrary to fact.

So:

• como si entendiera... = as if it understood...

This structure is very common in Spanish.

Because after como si, Spanish normally uses the imperfect subjunctive.

So:

• como si entiende = incorrect here
• como si entendiera = correct

This is one of the standard rules:

• como si + imperfect subjunctive

Even if the main verb is in the present (habla), the verb after como si still goes in the imperfect subjunctive.

Entendiera is the imperfect subjunctive form of entender.

Here it means something like:

• as if it understood

The imperfect subjunctive is often used after expressions involving:

• unreality
• imagination
• doubt
• hypothesis
• como si

So in this sentence, the doll is not literally being presented as understanding; it is only as if it did.

This is a very common question. In this structure, imperfect subjunctive does not mean simple past time.

After como si, Spanish uses the imperfect subjunctive as part of the grammar of unreal comparison:

• Habla... como si entendiera...

So the tense choice is not mainly about past vs present here. It is about the special pattern required after como si.

Think of it as a fixed structure:

• como si + imperfect subjunctive

Yes. Entendiera and entendiese are both valid imperfect subjunctive forms.

• como si entendiera
• como si entendiese

In modern everyday Spanish, -ra forms such as entendiera are usually more common.

Literally, it is:

• todo = everything
• lo que = that which / what
• dice = says

So todo lo que dice means everything that he/she says or everything she/he is saying, depending on context.

A helpful way to see it is:

• todo lo que dice = all the things that ... says

In todo lo que dice, the lo is part of the relative expression lo que, which often means what or that which.

Examples:

• No entiendo lo que dices = I don’t understand what you are saying
• Todo lo que dice = everything that he/she says

You cannot normally remove lo here:

• todo que dice = incorrect

So lo que is a set expression you should get used to.

It is not explicitly stated, so context decides.

In todo lo que dice, the subject of dice is usually understood as the same person referred to in the situation, for example the person who is speaking to the doll.

So the sentence often implies:

• He/She talks to his/her doll as if it understood everything he/she says

But grammatically, Spanish leaves that subject unstated because it is often recoverable from context.

Normally, no. In this sentence, dice most naturally refers to the person who is talking, not the doll.

Why?

Because the structure is:

• Habla con su muñeco = someone talks to the doll
• como si entendiera todo lo que dice = as if the doll understood everything that person says

So the most natural reading is:

• the doll understands
• the person says

If you wanted to make the doll the one speaking, you would usually need clearer wording.

The implied subject of entendiera is most naturally the doll (su muñeco).

So the sentence means:

• the person talks to the doll
• as if the doll understood everything

Spanish often leaves subjects unstated when they are easy to infer.

Not always exactly. Muñeco can mean:

• a doll
• a toy figure
• a figurine
• sometimes even a puppet-like or toy character, depending on context

In Spain, the exact feel of the word depends on the situation. If you specifically mean a stuffed toy, people may also say peluche if it is a soft toy.

So muñeco is broader than just one kind of English doll.

By itself, Habla in the present can mean either:

• something happening now
• something that happens regularly / habitually

So depending on context, the sentence could mean:

• She is talking to her doll as if it understood everything she says
• She talks to her doll as if it understood everything she says

Spanish present tense often covers both meanings.

Usually English would say as if it understood, not as if it understood everything she said unless the context is clearly past.

Even though Spanish uses entendiera, here that form is part of the como si structure and does not automatically make the whole idea past.

So the most natural English translation is usually:

• ...as if it understood everything she says

not necessarily:

• ...as if it understood everything she said

It sounds neutral and descriptive. It suggests that someone treats the doll like a real listener, probably affectionately or imaginatively.

The sentence does not itself say whether this is:

• cute
• childish
• sad
• humorous

That emotional tone would come from the wider context.