A paisagem da praia é linda, mas eu aceitei voltar cedo para o hotel.

Because da is the contraction of de + a.

• de = of / from
• a = the (feminine singular)

So:

• de a praia → da praia

This is standard Portuguese contraction and is required in normal usage.

Because linda agrees with paisagem, and paisagem is a feminine noun.

• a paisagem
• therefore: é linda

In Portuguese, adjectives usually agree in gender and number with the noun they describe.

Examples:

• o hotel é lindo
• a praia é linda
• a paisagem é linda

It describes paisagem, not praia.

The structure is:

• A paisagem da praia = the beach landscape / the scenery of the beach
• é linda = is beautiful

So the main noun is paisagem, and that is why the adjective matches paisagem.

Here aceitei means something like I agreed or I accepted.

The verb is aceitar.

In this sentence, it does not mean simply I accepted an object. It means:

• I agreed to return early
• I accepted the idea of returning early

So in context, agreed is often the most natural English translation.

Because aceitei is the preterite form of aceitar, used for a completed action in the past.

• eu aceito = I accept / I do accept
• eu aceitava = I used to accept / I was accepting
• eu aceitei = I accepted / I agreed

In the sentence, the speaker is talking about one finished decision: they agreed to go back early.

Because aceitar can be followed directly by an infinitive.

So:

• aceitar voltar
• aceitar sair
• aceitar esperar

This is normal Portuguese structure.

Examples:

• Aceitei ajudar. = I agreed to help.
• Ela aceitou sair comigo. = She agreed to go out with me.

English often uses to, but Portuguese does not always need a preposition before the infinitive.

Cedo here means early.

It is being used as an adverb, modifying voltar:

• voltar cedo = to return early

As an adverb, cedo does not change for gender or number.

Compare:

• cheguei cedo = I arrived early
• saímos cedo = we left early

Because para means to / toward, and o hotel means the hotel.

So:

• para + o = para o

In everyday Brazilian Portuguese, people very often say pro hotel, which is the contracted spoken form of para o hotel.

So these are equivalent in meaning:

• para o hotel
• pro hotel (more informal)

Yes. Portuguese often drops subject pronouns when the verb form already makes the subject clear.

So both are possible:

• mas eu aceitei voltar cedo para o hotel
• mas aceitei voltar cedo para o hotel

Including eu can add emphasis or contrast, as in:

• the scenery is beautiful, but I agreed to go back early

So eu is not required, but it is perfectly natural.

Portuguese uses definite articles more often than English.

• A paisagem da praia literally = The landscape of the beach
• In natural English, you might say The beach scenery or just The beach is beautiful, depending on context.

In Portuguese, starting with A paisagem... sounds normal and natural.

Mas means but.

It connects two contrasting ideas:

• A paisagem da praia é linda = The beach scenery is beautiful
• mas eu aceitei voltar cedo para o hotel = but I agreed to return early to the hotel

So the contrast is:

• the place is beautiful
• even so, the speaker agreed to leave early

Yes, you could, but the nuance is slightly different.

• aceitei voltar cedo = I agreed/accepted returning early
• concordei em voltar cedo = I agreed to return early

Both work, but aceitei can carry a sense of accepting a suggestion or decision, while concordei focuses more directly on agreeing.

In this sentence, aceitei voltar cedo sounds natural.

Yes. Praia is feminine:

• a praia
• a praia bonita
• a praia linda

But in this sentence, the adjective linda is still agreeing with paisagem, which is also feminine.

So both nouns are feminine, but grammatically the adjective belongs to paisagem.

Yes, literally it is the landscape/scenery of the beach.

But in more natural English, you might say:

• The beach scenery
• The view at the beach
• The beach landscape

So the Portuguese is straightforward, even if English may phrase it a little differently.