من هنوز تصمیم نگرفته ام که فردا به جشن بروم یا نه.

Yes, من can be omitted.

In Persian, the verb ending often already shows the subject, so تصمیم نگرفته‌ام by itself already means I have not decided. That means:

• من هنوز تصمیم نگرفته‌ام... = I still haven’t decided...
• هنوز تصمیم نگرفته‌ام... = same meaning, more natural in many contexts

Including من adds emphasis or clarity, similar to stressing I in English.

هنوز means still or yet, depending on the English translation.

In this sentence, it gives the idea that the decision has not been made up to now:

• هنوز تصمیم نگرفته‌ام = I still haven’t decided

It often appears in negative sentences to mean not yet / still not.

تصمیم نگرفته‌ام is the Persian present perfect negative form, literally something like I have not made a decision.

Breakdown:

• تصمیم = decision
• گرفتن = to take
• تصمیم گرفتن = to decide, literally to take a decision
• نگرفته‌ام = I have not taken

So تصمیم نگرفته‌ام literally means I have not taken a decision, but naturally it means I haven’t decided.

This is a very common Persian way to express an unfinished action up to the present moment.

It has several parts:

• نـ = negative marker
• گرفته = past participle of گرفتن
• ام = shortened written form of هستم / am used in the present perfect

So:

• گرفته‌ام = I have taken
• نگرفته‌ام = I have not taken

The invisible or lightly written ه before ام is part of the spelling: گرفته‌ام. In careful writing, it is usually written with a نیم‌فاصله / half-space.

In modern standard Persian, the preferred spelling is:

• نگرفته‌ام

with a half-space before ام, not a full space.

However, many learners and even native speakers sometimes write it with a regular space in informal typing:

• نگرفته ام

You should recognize both, but نگرفته‌ام is the more standard form.

Here که introduces the clause that follows, similar to whether or that in English depending on context.

In this sentence:

• تصمیم نگرفته‌ام که... = I haven’t decided whether...

So که links the main clause to the dependent clause:

• فردا به جشن بروم یا نه = whether I should go to the party tomorrow or not

بروم is the present subjunctive form of رفتن for I.

After expressions like decide whether, Persian often uses the subjunctive for the action being considered.

So:

• بروم = that I go / whether I should go
• می‌روم = I go / I am going
• رفتن = to go

In this sentence, the speaker is talking about a possible future action that has not been decided yet, so بروم is the right choice.

Because the ending -م marks first person singular.

The verb is from رفتن:

• stem used here: رو
• with the subjunctive prefix and ending: ب + رو + م
• result: بروم

So بروم means that I go / I should go / whether I go, depending on context.

یا نه means or not.

In a sentence like this, it completes the idea of whether:

• ...که فردا به جشن بروم یا نه
• ...whether I should go to the party tomorrow or not

It is very common and natural in Persian. Without یا نه, the sentence may still be understandable, but it would sound less complete in this kind of structure.

به here means to.

With motion verbs like رفتن (to go), Persian often uses به before a destination:

• به جشن رفتن = to go to the party
• به مدرسه رفتن = to go to school
• به خانه رفتن = to go home / to the house

So به جشن بروم means that I go to the party.

No ezafe is needed here, because جشن is simply the object of the preposition به.

• به جشن = to the party / to a party, depending on context

Persian usually does not have a word exactly like English the, so definiteness is often understood from context. In this sentence, English naturally translates it as the party, but Persian does not need a separate article.

فردا means tomorrow. In this sentence it appears before به جشن بروم, which is very natural:

• که فردا به جشن بروم یا نه

Persian word order is fairly flexible, so you may also hear variations like:

• که به جشن فردا بروم یا نه in a different meaning if tomorrow’s party is intended
• که بروم به جشن فردا یا نه is much less natural here

The original placement is the most straightforward for meaning whether I should go to the party tomorrow or not.

Yes. A more conversational version might be:

• هنوز تصمیم نگرفتم که فردا برم جشن یا نه.
• هنوز تصمیم نگرفتم فردا برم جشن یا نه.

Common informal changes:

• نگرفته‌ام → نگرفتم in speech, depending on style
• بروم → برم
• sometimes به جشن becomes just جشن in casual speech: برم جشن

But the original sentence is grammatically correct and more formal/standard.

They mean different things.

• تصمیم نگرفته‌ام = I haven’t decided
• تصمیم نمی‌گیرم = I don’t decide or I am not deciding

For this context, where the speaker means the decision has not been made yet, تصمیم نگرفته‌ام is correct.

If you said تصمیم نمی‌گیرم, it would sound more like a habitual action or a refusal to decide, which is not the intended meaning here.

A natural pronunciation would be approximately:

man hanuz tasmim nagerefte-am ke fardâ be jashn beravam yâ na

In more natural conversational speech, it may sound closer to:

man hanooz tasmim nagereftam ke fardâ be jashn beram yâ na

A few notes:

• هنوز is often pronounced hanooz
• بروم is often pronounced more like beram in speech
• یا نه is often said smoothly as yâ na

Yes, very much.

The structure is:

• من هنوز تصمیم نگرفته‌ام = I still haven’t decided

• که فردا به جشن بروم یا نه = whether I should go to the party tomorrow or not

So the sentence maps quite closely to English, even though Persian uses decision + take instead of a single verb like decide.