يمكن أن تستعير نسخة بشرط أن تكون متاحة.

Yes, in this sentence يمكن is used to express possibility or permission, much like can in English.

• يمكن literally means something like it is possible
• So يمكن أن تستعير... means it is possible for you to borrow..., which is naturally translated as you can borrow...

This is a very common MSA way to say can / may in a formal or neutral register.

After يمكن, Arabic often uses أن + present tense verb.

So:

• يمكن = it is possible
• أن تستعير = that you borrow / to borrow

Together:

• يمكن أن تستعير = you can borrow

Grammatically, أن introduces a following verb in the subjunctive mood. In everyday translation, though, you can simply understand يمكن أن + verb as a standard pattern meaning can + verb.

تستعير is the present tense form meaning you borrow.

In MSA, a verb beginning with تـ can refer to several things depending on context, including:

• you (masculine singular)
• you (feminine singular)
• she

Here, the context makes it clear that it means you borrow.

So:

• تستعير = you borrow / you may borrow

Because the sentence is directed at the listener, the intended meaning is you.

نسخة means a copy, while النسخة would mean the copy.

In this sentence, the speaker means a copy in a general sense, not a specific previously identified copy. So the indefinite form is natural:

• نسخة = a copy
• النسخة = the copy

If you said يمكن أن تستعير النسخة..., that would suggest a specific copy already known in the conversation.

بشرط means on condition that, provided that, or as long as.

It comes from:

• بـ = with / by
• شرط = condition

So بشرط أن... is a very common formal expression meaning:

• provided that...
• on the condition that...

In this sentence:

• بشرط أن تكون متاحة = provided that it is available

The expression is normally بشرط أن + verb.

So:

• بشرط = on condition
• أن تكون = that it be / that it is

This structure is very common in formal Arabic. After أن, the present tense verb appears in the subjunctive.

Here, تكون comes from كان يكون and means be.

So:

• بشرط أن تكون متاحة = provided that it is available

They are feminine because they refer to نسخة, and نسخة is a feminine noun.

So the condition is really about the copy:

• نسخة = a copy
• تكون = it be
• متاحة = available

Since نسخة is feminine, the grammar agrees with it:

• feminine verb form: تكون
• feminine adjective: متاحة

If the noun were masculine, the forms would change.

متاحة is an adjective meaning available.

It is not the main verb of the clause. The verb is تكون (be), and متاحة is the predicate adjective describing نسخة.

So the structure is:

• تكون = be
• متاحة = available

Together:

• تكون متاحة = be available

Because نسخة is feminine, the adjective appears in the feminine form متاحة.

Here, تكون means it is / it be, referring back to نسخة.

Even though تكون can sometimes mean you are in other contexts, here the meaning is clearly:

• provided that it is available

The subject is not written separately because Arabic often leaves pronouns implied inside the verb. In this case, the implied subject is هي (she/it), referring to the feminine noun نسخة.

Yes. Arabic often has more than one natural way to express the same idea. For example:

• يمكنك أن تستعير نسخة بشرط أن تكون متاحة
• يمكن استعارة نسخة إذا كانت متاحة
• يمكنك استعارة نسخة إذا كانت متاحة

These are slightly different in structure, but all are natural.

Your original sentence is a good formal MSA sentence. It has an impersonal, neutral style:

• يمكن أن... = it is possible to...
• بشرط أن... = provided that...

That style is especially common in written notices, policies, and formal instructions.

In careful spoken or fully vocalized MSA, you may hear the final vowels, but in normal speech and most unscripted reading, many speakers do not fully pronounce all case endings.

For a learner, the important parts are the core words and structure:

• يمكن أن تستعير نسخة بشرط أن تكون متاحة

If you are reading formal MSA aloud, a fully vocalized version would show more endings. But in practice, many learners and native speakers in modern usage focus more on the correct words and verb forms than on every final case vowel.

So yes, the grammar is there, but you do not need to panic about pronouncing every ending perfectly at an early stage.