يدرك صديقي المشكلة.

It is a verbal sentence in the common Arabic order:

verb + subject + object

So here:

• يدرك = the verb
• صديقي = the subject
• المشكلة = the direct object

A very literal breakdown is:

• يدرك = understands / realizes
• صديقي = my friend
• المشكلة = the problem

This verb-first order is very normal in Modern Standard Arabic.

In the imperfect verb system, the prefix often tells you the person.

Here, يـ in يدرك marks third person masculine singular, so the verb means:

• he understands
• he realizes
• he perceives

Then the following noun صديقي identifies who that he is: my friend.

So Arabic does not need a separate word for he here. The verb already contains that information.

Yes. يدرك is the imperfect form, which often corresponds to the English present and sometimes future, depending on context.

In this sentence, without any future marker such as سـ or سوف, the most natural reading is present:

• he understands
• he realizes

So يدرك صديقي المشكلة is naturally understood as a present-time statement.

يدرك can cover several related ideas, including:

• understands
• realizes
• grasps
• perceives

The exact best translation depends on context.

With المشكلة meaning the problem, the sentence could suggest that your friend:

• understands the problem
• realizes what the problem is
• grasps the issue

So this verb is a little broader than a single English word.

صديقي is made of:

• صديق = friend
• ـي = my

So صديقي means my friend.

That final ـي is a possessive suffix attached directly to the noun. Arabic often expresses possession this way instead of using a separate word like my before the noun.

Because صديقي is already definite.

When a noun takes a possessive suffix like ـي meaning my, it automatically becomes definite. So:

• صديق = a friend / friend
• صديقي = my friend

You do not add ال to a noun that already has a possessive suffix like this.

So صديقي is correct, and الصديقي would not be the normal form for my friend.

ال is the Arabic definite article, meaning the.

So:

• مشكلة = a problem / problem
• المشكلة = the problem

In this sentence, the object is definite, so Arabic uses ال just as English uses the.

It is the direct object, so in full grammatical vowel marking it would be accusative.

Fully vocalized, the sentence would be:

يُدْرِكُ صَدِيقِي الْمُشْكِلَةَ

Notice the final ـةَ / -ata sound on المشكلةَ in full formal pronunciation.

However, in normal Arabic writing, short vowel endings are usually not written, so you just see:

يدرك صديقي المشكلة

That is why learners often do not see the case ending in everyday text.

Yes. That is also correct.

Compare:

• يدرك صديقي المشكلة = verb-first, a very standard verbal sentence
• صديقي يدرك المشكلة = subject-first, often giving a little more emphasis to my friend

Both are grammatical in Modern Standard Arabic. The first is more classically verb-first; the second can feel slightly more like My friend understands the problem with the subject foregrounded.

A careful fully vocalized pronunciation is:

yudriku ṣadīqī al-mushkilata

A few helpful notes:

• yu- in yudriku
• ṣ in ṣadīqī is an emphatic s
• sh in mushkila sounds like English sh
• the final -ta of al-mushkilata appears in full case pronunciation

At the end of a sentence, many speakers in formal reading pause and do not fully pronounce the final case vowel, so you may also hear something closer to:

yudriku ṣadīqī al-mushkila

Grammatically, صديق is masculine singular, so صديقي normally means my male friend.

If you wanted to say my female friend, you would usually say:

صديقتي

So in most ordinary contexts:

• صديقي = my male friend
• صديقتي = my female friend

That is an important distinction in Arabic.