أفهم القضية.

A careful MSA reading is roughly:

ʾafhamu al-qaḍiyyata

At the end of a sentence, short case endings are often not pronounced, so in normal pause you will commonly hear something closer to:

ʾafham al-qaḍiyya

A rough sound guide:

• أفهم = af-ham
• القضية = al-qa-diy-ya

Two sounds may feel unfamiliar:

• ق is a deep q sound, farther back than English k
• ض is an emphatic d sound

أفهم is the 1st person singular imperfect form of the verb فَهِمَ (to understand).

So:

• فَهِمَ = he understood
• أفهم = I understand / I am understanding

The root is ف-ه-م, which carries the idea of understanding or comprehension.

In Arabic, the verb itself usually shows the subject.

Here, the prefix أَ- on أفهم already means I. So:

• أفهم = I understand

You can add أنا if you want extra emphasis or contrast:

• أنا أفهم القضية = I understand the issue

But أنا is not required.

By itself, أفهم is normally present or general/habitual:

• I understand
• I do understand

Depending on context, the Arabic imperfect can sometimes refer to the future, but if you want to clearly mark the future, you usually add:

• سأفهم = I will understand
• سوف أفهم = I will understand

So in this sentence, the default reading is I understand the issue/case.

القضية can mean several related things depending on context, such as:

• the issue
• the matter
• the case
• the cause (in some contexts)

So the exact English translation depends on the situation. In a legal context, it may mean the case. In general discussion, it often means the issue or the matter.

الـ is the Arabic definite article, meaning the.

So:

• قضية = an issue / a case
• القضية = the issue / the case

That is why the noun is definite in this sentence.

The ending ـة is called tāʾ marbūṭa. It often marks a noun as feminine.

So قضية is a feminine noun.

This does not mean the word refers to a female person. Many inanimate nouns in Arabic are grammatically feminine. It is just part of the noun’s grammar.

If you later describe القضية with an adjective, the adjective will usually be feminine too:

• القضية واضحة = the issue is clear

Because فَهِمَ (to understand) normally takes a direct object in Arabic, just as in English.

So:

• أفهم القضية = I understand the issue

You do not need a preposition like of or about here.

In fully vocalized formal Arabic, the sentence is:

أفهمُ القضيةَ

Here:

• أفهمُ ends with ـُ because it is an imperfect verb in the indicative mood
• القضيةَ ends with ـَ because it is the direct object and therefore accusative

However, in normal writing, these short vowels are usually omitted, so you see simply:

أفهم القضية

And in normal speech, especially at the end of the sentence, those final short vowels are often not pronounced clearly.

Yes. That is completely correct.

Compare:

• أفهم القضية = neutral, normal
• أنا أفهم القضية = I understand the issue, with more emphasis on I

Arabic often leaves the subject pronoun out when the verb already makes it clear, so the shorter version is very common.

Yes, but the most neutral version here is أفهم القضية.

You may also see:

• أنا أفهم القضية
• القضية أفهمها in a more marked structure, roughly The issue, I understand it

Word order in Arabic can shift for emphasis, topic, or style, but for a learner, أفهم القضية is the best straightforward pattern to remember:

• verb + object