تفشل المركبة في الفحص.

Yes. In Modern Standard Arabic, it is very common for a sentence to begin with the verb. So تفشل المركبة في الفحص is a normal verb–subject–prepositional phrase order:

• تفشل = fails / is failing
• المركبة = the vehicle
• في الفحص = in the inspection / on the inspection

Arabic can also use a subject-first order for emphasis, but the verb-first order is very common and natural.

Because المركبة is a feminine noun in Arabic.

So the verb must be feminine singular:

• تفشل = she/it fails

Even though English says the vehicle and treats it as it, Arabic nouns still have grammatical gender. Since مركبة is feminine, the verb appears in the feminine form.

تفشل is an imperfect verb, 3rd person feminine singular, from the root ف ش ل.

In context, it can mean:

• fails
• is failing
• sometimes will fail, depending on context

In this sentence, the most natural English rendering is usually The vehicle fails the inspection or The vehicle fails in the inspection.

Because يفشل is masculine, while تفشل is feminine.

Compare:

• يفشل الطالب = the male student fails
• تفشل الطالبة = the female student fails
• تفشل المركبة = the vehicle fails

Since المركبة is feminine, تفشل is the correct form.

Not exactly.

• المركبة means the vehicle
• السيارة means the car

So مركبة is more general. It can refer to a car, truck, or another vehicle. It is also a bit more formal or technical in many contexts.

If the sentence used السيارة, it would specifically mean the car.

في usually means in, but with some verbs it is best translated more naturally in English.

Here, تفشل في is like fail in or fail at something.

So:

• تفشل في الفحص literally: fails in the inspection
• natural English: fails the inspection

This is a good example of how Arabic and English use prepositions differently.

Because the verb فشل is commonly followed by في when it means to fail in / fail at something.

So Arabic says:

• فشل في الامتحان = he failed the exam
• فشلت في المهمة = she failed in the task

In English, we often say fail the test with no preposition, but Arabic typically uses في with فشل.

الفحص means the inspection or the examination/test.

Using ال can make it sound like:

• a specific inspection already known from context, or
• a general institutional process, such as the standard vehicle inspection

This is very natural in Arabic. English may or may not use the, depending on context, but Arabic often uses the definite article in these situations.

الفحص comes from a word meaning inspection, examination, or checking.

In this sentence, because the subject is المركبة = the vehicle, الفحص most likely means:

• a vehicle inspection
• a technical inspection
• a safety check

So it is not necessarily a school-style exam. It is more likely an official or mechanical inspection.

No. They only look somewhat similar in writing.

They come from different roots:

• فشل = to fail
• فحص = to inspect / examine

So:

• تفشل = it fails
• الفحص = the inspection

This sentence is a good one to read carefully, because the two words are visually similar for beginners.

A careful pronunciation is:

tafshalu al-markabatu fi al-faḥṣi

If you say it in normal pause form, it is often pronounced more simply as:

tafshal al-markaba fi al-faḥs

A few notes:

• تَفْشَلُ = tafshalu
• المَرْكَبَةُ = al-markabatu
• الفَحْصِ = al-faḥṣi
• the ḥ represents the Arabic letter ح, a deeper h sound

المركبة is the subject of the sentence, so in full vowelled Classical/MSA pronunciation it would be مرفوع nominative:

• المركبةُ

That is why the full form is:

• تفشلُ المركبةُ في الفحصِ

Also:

• الفحصِ is after the preposition في, so it is genitive: الفحصِ

In normal everyday writing, these case endings are usually not written, but they are still understood in formal grammar.

Yes. The imperfect verb in Arabic can cover both, depending on context.

So تفشل المركبة في الفحص could mean:

• The vehicle fails the inspection
• The vehicle is failing the inspection
• The vehicle will fail the inspection if the context points to the future

If Arabic wants to make the future clearer, it might add:

• ستفشل المركبة في الفحص = the vehicle will fail the inspection

Yes, depending on what you mean. For example:

• تفشل السيارة في الفحص = the car fails the inspection
• تفشل الشاحنة في الفحص = the truck fails the inspection
• تفشل الدراجة في الفحص = the motorcycle/bike fails the inspection

The verb would still stay feminine if the noun is grammatically feminine. If you use a masculine noun, the verb would change accordingly.

Yes. The literal structure is something like:

• The vehicle fails in the inspection

But more natural English would usually be:

• The vehicle fails the inspection
• The vehicle does not pass the inspection

So the Arabic structure is slightly different from the most natural English phrasing.