La dama abrió la puerta.

Because both nouns are singular feminine.

In Spanish, the definite article agrees with the noun in gender and number:

• la dama = the lady
• la puerta = the door

If the noun were masculine singular, you would usually use el. If it were feminine plural, you would use las.

It is perfectly understandable, but in modern everyday Spanish in Spain, dama can sound a bit formal, refined, literary, or old-fashioned, depending on context.

More everyday possibilities are:

• mujer = woman
• señora = lady / madam / adult woman, often polite

So La dama abrió la puerta is grammatically fine, but the choice of dama gives the sentence a slightly elegant tone.

Abrió is the third-person singular preterite of abrir.

That means it is used for a completed action in the past:

• abrir = to open
• abrió = opened

In this sentence, it tells you that the action happened and is finished.

The accent mark shows that the stress falls on the final syllable: a-BRIÓ.

Without the accent, abrio would be stressed differently under normal Spanish stress rules, so abrió needs the written accent.

This is also the standard spelling pattern for many third-person singular preterite forms of -er and -ir verbs, such as:

• comió
• vivió
• abrió

Spanish often does not use subject pronouns when they are unnecessary.

Here, the subject is already clearly stated as la dama, so there is no need to add ella.

Spanish prefers this kind of structure:

• La dama abrió la puerta.

rather than adding an extra pronoun unless you want emphasis or contrast.

Yes. On its own, abrió can mean:

• he opened
• she opened
• you opened when speaking formally to one person (usted)

But in this sentence, there is no ambiguity because la dama is the subject.

Because this sentence uses the normal Subject–Verb–Object order:

• La dama = subject
• abrió = verb
• la puerta = direct object

This is the most neutral word order in Spanish, just as in English.

Spanish word order is more flexible than English, but this version is the straightforward, standard one.

Yes. Abrir is a regular -ir verb.

Its preterite forms are:

• abrí
• abriste
• abrió
• abrimos
• abristeis
• abrieron

So abrió follows a normal pattern rather than being irregular.

Yes, very often, depending on the context.

In Spain, the present perfect is commonly used for actions connected to the present, especially with time expressions like hoy or esta mañana:

• La dama ha abierto la puerta.

The simple preterite abrió is also correct, but it often sounds more like a finished past event in narration or when the action is seen as fully completed in a past time frame.

So both forms are possible, but they do not always sound exactly the same in context.

A rough English-friendly guide is:

la DA-ma a-BRYOH la PWER-ta

A few pronunciation notes:

• d in dama is softer than a typical English d
• b in abrió is also softer between vowels
• the r in abrió and puerta is a quick single tap, not an English r
• puer- sounds roughly like pwer

A more precise pronunciation in IPA is:

[la ˈðama aˈβɾjo la ˈpweɾta]