A fechadura da porta está velha, e o trinco às vezes não fecha bem.

In Portuguese, definite articles are used much more often than in English.

So a fechadura and o trinco are completely natural, where English might simply say the lock and the latch, or sometimes even leave the article out in similar contexts.

Here:

• a fechadura = the lock
• o trinco = the latch / bolt

Using the article is the normal default in Portuguese with specific nouns like these.

Da is a contraction of:

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

So:

• da porta = of the door

That means:

• a fechadura da porta = the door’s lock / the lock of the door

This kind of de + article contraction is extremely common in Portuguese:

• de + o = do
• de + a = da
• de + os = dos
• de + as = das

This is a very common question because Portuguese has two verbs meaning to be: ser and estar.

Here, está velha is used because the sentence is describing the current condition or state of the lock. The idea is that the lock has become old/worn.

• estar is often used for condition, state, or how something is at the moment
• ser is more for identity, classification, or more permanent/basic characteristics

So:

• A fechadura está velha = The lock is old / worn out in its current condition

If you said é velha, it would sound more like you are classifying it as an old lock in a more general sense. In this context, está velha is the natural choice.

Because velha agrees with fechadura, which is a feminine singular noun.

• a fechadura = feminine singular
• adjective must match it
• so: velha

Compare:

• o trinco está velho = the latch is old
• a fechadura está velha = the lock is old

This kind of agreement is very important in Portuguese.

They are related, but they are not the same thing.

• fechadura = the lock mechanism, especially the part where the key goes
• trinco = the latch, bolt, or fastening piece that catches/closes the door

So the sentence is saying that:

1. the lock itself is old
2. and the latch sometimes does not close properly

In real life, these parts work together, but Portuguese distinguishes them as separate things.

The verb fechar basically means to close or to shut, but in context it can also imply to latch properly or to close securely.

So:

• não fecha bem literally = doesn’t close well
• natural English meaning = doesn’t close properly / doesn’t latch properly

With doors, locks, windows, lids, etc., fechar is very broad and often covers the idea of shutting in a way that works correctly.

Às vezes means sometimes.

The accent on às is a grave accent, and it marks the contraction of two a sounds. In this expression, it comes from a fusion similar to a + as.

You do not need to analyse it every time, though — it is best learned as a fixed expression:

• às vezes = sometimes

A few examples:

• Às vezes chove. = Sometimes it rains.
• Às vezes não percebo. = Sometimes I don’t understand.

It is a very common phrase, and the accent is always written.

In Portuguese, não normally goes directly before the verb it negates.

So:

• não fecha = does not close

That is the standard position:

• O trinco não fecha bem. = The latch doesn’t close properly.

This is much more straightforward than in English because Portuguese does not need do/does for this kind of negative sentence.

Both are possible, but the placement changes the rhythm and emphasis a little.

• às vezes não fecha bem = the most neutral and natural way to say sometimes it doesn’t close properly
• não fecha bem às vezes = possible, but it sounds more marked, as if às vezes is being added later or emphasized differently

In Portuguese, adverbs like às vezes can move around, but the most natural place is often before the verb phrase.

Bem usually means well, but in this sentence it is best translated as properly.

So:

• não fecha bem = doesn’t close well
• more natural English = doesn’t close properly

This is a very common use of bem in Portuguese:

• não funciona bem = it doesn’t work properly
• não abre bem = it doesn’t open properly
• não encaixa bem = it doesn’t fit properly

In this sentence, velha can suggest more than just age. For objects, it often implies that something is old enough to be worn, outdated, or no longer working well.

So A fechadura da porta está velha can suggest:

• the lock is old
• the lock is worn
• the lock is past its best

That is why the second part of the sentence about the latch not closing properly fits very naturally.

Yes, grammatically you could, but it would not be the most natural choice here.

• é velha sounds more like a general description: it is an old lock
• está velha sounds like its present condition is old/worn and probably causing problems

Because the sentence continues with e o trinco às vezes não fecha bem, the idea is clearly about condition and malfunction, so está velha is the better option.

A rough European Portuguese pronunciation would be something like:

A fechadura da porta está velha, e o trinco às vezes não fecha bem.

Approximate pronunciation: uh fesh-uh-DOO-ruh duh POR-tuh shtah VEL-yuh, ee oo TREEN-koo az VEH-zesh now FEH-zhuh bayng

A few European Portuguese points:

• fechadura has a sh sound in cha
• está often sounds like shtá
• velha has the lh sound, like a soft ly
• às vezes in European Portuguese often sounds reduced in fast speech
• fecha usually has a zh/sh-like sound depending on accent and context

If you want to sound natural, focus especially on:

• lh in velha
• the reduction of unstressed vowels
• não with a nasal sound

Yes. Portuguese often includes details for clarity, but if everyone already knows you are talking about the door, you could shorten it.

For example:

• A fechadura está velha, e o trinco às vezes não fecha bem.

That still sounds natural.

But da porta helps specify exactly which lock is being discussed, especially if there are several locks or doors around.