فردا باید به بازار بروم چون نان ندارم.

After باید (must / have to), Persian normally uses the subjunctive form of the verb, not the present indicative with می-.

• باید بروم = I must go / I have to go (subjunctive)
• می‌روم = I go / I am going (habitually or right now) (indicative)
  So باید می‌روم is generally not grammatical in standard Persian.

بروم is the present subjunctive, 1st person singular of رفتن (to go).
Formation: بـ + present stem + personal ending

• Verb: رفتن
• Present stem: رو-
• Subjunctive marker: بـ → برو-
• Ending for “I”: -م → بروم

به is a very common preposition meaning to / toward (direction). With places, it often marks destination:

• به بازار = to the bazaar/market
  You can sometimes omit it in casual speech, but in standard writing it’s normal to include it, especially for clarity.

No ezâfe (-e/-ye) is needed because بازار is not being linked to a following noun/adjective.
Ezâfe is used for connections like:

• بازارِ بزرگ (the big market)
• نانِ تازه (fresh bread)
  Here, به بازار stands alone, so no ezâfe.

All can mean because, but they differ in style:

• چون: very common, neutral; frequent in both speech and writing
• زیرا: more formal/written; often closer to since/for
• چرا که: more literary/formal
  In everyday Persian, چون is often the easiest default.

Persian distinguishes “I don’t have X” from “There is no X.”

• نان ندارم = I don’t have bread (about the speaker’s possession/situation)
• نان نیست = There is no bread (available/existing) (more general)
  In this sentence, the idea is “I personally don’t have any bread,” so ندارم is the natural choice.

ندارم = نـ + دارم

• دارم = I have
• نـ makes it negative: I don’t have
  This is a standard negative prefix used with many verbs in Persian.

Yes—Persian commonly drops subject pronouns because the verb ending shows the person:

• بروم ends in -م → “I”
• ندارم ends in -م → “I”
  You can add من for emphasis/contrast, but it’s not required:
• فردا من باید به بازار بروم... (emphatic)

Basic Persian word order is SOV (Subject–Object–Verb), but it’s flexible. Here:

• فردا (time adverb)
• باید (modal)
• به بازار (destination phrase)
• بروم (verb at the end)
  Then the reason clause: چون نان ندارم.
  You can move فردا or چون... around for emphasis, but keeping the verb at/near the end is very common.

فردا means tomorrow (and sometimes “the next day” in context). It often appears near the beginning of the sentence, but it can also come later:

• فردا باید به بازار بروم... (very common)
• باید فردا به بازار بروم... (also fine)

Common colloquial changes include dropping به, shortening verbs, and using نون for نان:

• فردا باید برم بازار چون نون ندارم.
  (برم = casual form of بروم; نون = colloquial pronunciation of نان)

Approximate pronunciations (informal romanization):

• فردا = fardâ
• باید = bâyad (often said quickly as bâyad / bāyad)
• بازار = bâzâr
• بروم = beravam (often reduced in speech)
• چون = chon
• نان ندارم = nân nadâram