أشعر أن العمل مهم.

A careful fully-vowelled pronunciation is:

أشعُرُ أنَّ العملَ مهمٌّ

A helpful transliteration is:

ashʿuru anna al-ʿamala muhimmun

A few notes:

• ʿ represents the Arabic letter ع
• أن here is really أنَّ in full grammatical form
• In normal reading aloud, many speakers pause at the end, so the last word may sound more like muhimm than muhimmun

Here is the breakdown:

• أشعر = I feel
• أنَّ = that
• العمل = the work / work / the job, depending on context
• مهم = important

So the structure is:

• main clause: أشعر = I feel
• embedded clause: أنَّ العمل مهم = that the work is important

أنَّ introduces a clause after verbs like feel, know, think, and similar expressions. In English, this is often the word that.

So:

• أشعر أنَّ... = I feel that...

This is a very common Arabic pattern.

Important detail: in unvowelled Arabic text, أنَّ is often written simply as أن, because short vowels and the shadda are usually not written.

In this sentence, it is أنَّ, not أنْ.

Why?

Because أنَّ is followed by a full noun clause:

• أنَّ العملَ مهمٌّ = that the work is important

By contrast, أنْ usually comes before a verb and often has a meaning closer to to in English, as in:

• أريد أن أعمل = I want to work

So in your sentence, the correct grammatical analysis is أنَّ.

Yes—grammatically it does change, but ordinary Arabic spelling usually does not show the short vowel ending.

After أنَّ, the following noun becomes accusative. So the fully vowelled form is:

• العملَ

But without case endings written, it appears simply as:

• العمل

So the sentence as fully vowelled is:

أشعُرُ أنَّ العملَ مهمٌّ

Even though you do not see the fatḥa in normal writing, it is there grammatically.

Because Arabic normally does not use a present-tense verb to be in sentences like this.

So:

• العمل مهم literally looks like the work important
• but it means the work is important

This is completely normal in Arabic.

If the sentence were in the past or future, Arabic would use forms of كان or other structures, but in the present tense the is/am/are is usually omitted.

Because مهم here is the predicate adjective, not an attributive adjective directly attached to a noun.

Compare:

• العمل مهم = the work is important
  Here مهم is the predicate, so it is normally indefinite.

• العمل المهم = the important work
  Here المهم is an adjective describing العمل inside one noun phrase, so it matches it in definiteness.

So in your sentence, مهم is correct.

Because the verb أشعر already tells you the subject is I.

In Arabic, verbs usually contain the subject information within their form. So:

• أشعر already means I feel

You can say أنا أشعر if you want extra emphasis or contrast, such as:

• أنا أشعر أن العمل مهم، لكن هو لا يشعر بذلك
  I feel that the work is important, but he doesn’t feel that

But in a neutral sentence, leaving out أنا is more natural.

It can mean any of those, depending on context.

العمل is literally definite, so word-for-word it is the work. But Arabic often uses a definite noun where English might prefer a more general translation like work.

Possible translations include:

• the work
• work
• the job

Context decides which one sounds best in English.

Yes, you may also encounter أشعر بأنَّ العمل مهمٌّ.

Both patterns are used:

• أشعر أنَّ العمل مهمٌّ
• أشعر بأنَّ العمل مهمٌّ

The version without بـ is straightforward and natural. The version with بأنَّ is also common, especially in more formal styles.

So for a learner, the important thing is to recognize both.

The whole sentence starts with a verb, so the main sentence is verbal:

• أشعر = verb

But inside it, after أنَّ, you have a clause that is basically nominal in meaning:

• العمل مهم = the work is important

So you can think of it like this:

• main clause: verbal
• embedded clause: nominal

This kind of mixed structure is very common in Arabic.

It would be:

أشعُرُ أنَّ العملَ مهمٌّ

With grammatical roles:

• أشعُرُ = verb, I feel
• أنَّ = particle that
• العملَ = the noun after أنَّ, so it is accusative
• مهمٌّ = predicate of أنَّ, so it is nominative

In everyday writing, this is usually shortened to:

أشعر أن العمل مهم

So learners should get used to reading sentences whose case endings are understood from grammar, not shown in spelling.