أما سلسلة الدراجة فهي قديمة.

Here أما introduces a topic and often has the sense of as for..., regarding..., or when it comes to....

So:

أما سلسلة الدراجة فهي قديمة
= As for the bicycle chain, it is old.

This structure is very common in Arabic when the speaker wants to shift focus or contrast one topic with another.

After أما, Arabic very often uses فـ in the next part of the sentence. This فـ is sometimes called فاء الجواب or فاء التفريع in this kind of structure.

So the pattern is often:

أما + topic + فـ + comment

In this sentence:

• أما سلسلة الدراجة = as for the bicycle chain
• فهي قديمة = it is old

The فـ does not usually need to be translated directly into English, but it is a normal and expected part of the Arabic structure.

The word هي is a pronoun meaning it / she, and it refers back to سلسلة الدراجة.

Arabic often uses this resumptive pronoun after a fronted topic. Since أما سلسلة الدراجة sets up the topic, هي picks it up again in the main clause:

• أما سلسلة الدراجة = as for the bicycle chain
• فهي قديمة = then it is old

This can feel a little repetitive to an English speaker, but it is very natural in Arabic.

Because سلسلة is a feminine noun.

In Arabic, predicates and adjectives agree with the noun in gender. Since سلسلة means chain and is grammatically feminine, the word describing it must also be feminine:

• masculine: قديم
• feminine: قديمة

So:

• الكتاب قديم = the book is old
• السلسلة قديمة = the chain is old

Even though English nouns usually do not have grammatical gender, Arabic nouns do, and agreement is very important.

This is an iḍāfa construction, often called a construct phrase. It expresses relationships like:

• the chain of the bicycle
• more naturally in English: the bicycle chain

In an iḍāfa:

1. the first noun usually does not take ال
2. the second noun can make the whole phrase definite if it has ال

So:

• سلسلة = chain
• الدراجة = the bicycle

Together:

• سلسلة الدراجة = the bicycle chain

You normally do not say السلسلة الدراجة for this meaning.

A fully vocalized version would typically be:

أمّا سِلْسِلَةُ الدَّرّاجَةِ فَهِيَ قَديمَةٌ

Breakdown:

• سلسلةُ: nominative, because it is the topic/subject-like element here
• الدراجةِ: genitive, because it is the second noun in the iḍāfa
• قديمةٌ: nominative as the predicate of the nominal sentence

In normal unvoweled writing, these endings are usually omitted, so you see:

أما سلسلة الدراجة فهي قديمة

It is one noun phrase: سلسلة الدراجة.

This whole phrase means the bicycle chain. The head noun is سلسلة (chain), and الدراجة specifies what chain it is: the chain of the bicycle.

So the sentence is not saying:

• As for the chain, the bicycle is old

It is saying:

• As for the bicycle chain, it is old

That iḍāfa relationship is crucial.

It is basically a nominal sentence with a topicalized opening.

You can think of it like this:

1. أما سلسلة الدراجة = the topic being introduced
2. فهي قديمة = a nominal clause commenting on that topic

Inside فهي قديمة:

• هي = subject
• قديمة = predicate

So this is a very Arabic way of saying: As for X, it is Y.

Yes. That would also be correct and natural:

سلسلة الدراجة قديمة
= The bicycle chain is old

This version is simpler and more neutral.

By contrast:

أما سلسلة الدراجة فهي قديمة
adds a sense of topic shift, contrast, or special focus.

For example, it might imply something like:

• the bicycle itself may be fine, but as for the chain, it is old
• we are discussing several parts, and now we are talking about the chain

So أما ... فـ is not just basic description; it also organizes discourse.

Here it functions as the predicate of the sentence, not as an attributive adjective inside a noun phrase.

Compare:

1. سلسلة قديمة = an old chain

   • here قديمة is an adjective describing the noun inside the phrase

2. السلسلة قديمة = the chain is old

   • here قديمة is the predicate

In your sentence:

فهي قديمة = it is old

So قديمة is the predicate.

A careful MSA pronunciation would be approximately:

ʾammā silsilatu d-darrājati fa-hiya qadīmatun

A few notes:

• أما = ʾammā
• سلسلة = silsila / with case ending silsilatu
• الدراجة = ad-darrāja / with case ending d-darrājati
• فهي = fa-hiya
• قديمة = qadīma / with case ending qadīmatun

In pause, final case vowels are usually not pronounced, so in normal reading aloud you might hear something closer to:

ʾammā silsilat ad-darrāja fa-hiya qadīma

Because it is the second term of an iḍāfa construction.

In Arabic, when two nouns are linked in a possessive/genitive relationship:

• first noun = no ال usually, and its case depends on its role in the sentence
• second noun = genitive

So:

• سلسلةُ = chain, here nominative
• الدراجةِ = of the bicycle, therefore genitive

That is why the fully vocalized phrase is:

سلسلةُ الدراجةِ

Often, yes.

أما frequently suggests that the speaker is separating one topic from others. It can sound like:

• as for...
• regarding...
• when it comes to...

So this sentence may imply a contrast such as:

• The bicycle frame is new, but as for the chain, it is old
• We have discussed the wheels; as for the chain, it is old

The contrast does not have to be stated explicitly, but أما often gives that feeling.

No, in this sentence هي refers to the whole topic phrase سلسلة الدراجة, whose head noun is سلسلة.

Since سلسلة is the main noun in the phrase, that is what controls agreement. The pronoun matches the head noun, not the second noun of the iḍāfa.

So هي refers to:

• سلسلة الدراجة = the bicycle chain

not to:

• الدراجة = the bicycle

Yes, depending on context, قديم / قديمة can mean:

• old
• ancient
• former
• longstanding

But in this sentence, with سلسلة الدراجة, the natural meaning is simply old or worn from age/use.

So the most natural interpretation is:

The bicycle chain is old.