امتحان فردا صبح شروع میشود، پس امشب باید زود بخوابم.

A word-by-word breakdown is:

• امتحان = exam, test
• فردا = tomorrow
• صبح = morning
• شروع = start, beginning
• می‌شود / میشود = starts, becomes, happens
• پس = so, therefore
• امشب = tonight
• باید = must, have to
• زود = early
• بخوابم = I sleep / I go to sleep

A natural translation of the whole sentence is:

The exam starts tomorrow morning, so I have to go to bed early tonight.

A common transliteration is:

emtehân fardâ sobh shoru' mishavad, pas emshab bâyad zud bekhâbam

More naturally in everyday speech, it may sound closer to:

emtehân fardâ sob shoru' mishe, pas emshab bâyad zud bokhâbam

A few pronunciation notes:

• خ = a throaty kh sound, like in Bach or Loch
• ق / غ are often pronounced similarly in modern Iranian Persian
• می‌شود is often pronounced mishe in casual speech
• بخوابم is often pronounced bokhâbam in speech, even though the spelling shows be-

In Persian, شروع شدن literally means to begin / to get started, and it is a very common way to say something starts.

So:

• امتحان شروع می‌شود = The exam starts

This is a normal Persian structure, even though it may feel a bit different from English.

You may also see:

• امتحان شروع می‌کند — this would sound odd here, because that means the exam starts something, as if the exam were the doer acting on something else.
• امتحان آغاز می‌شود — also correct, a bit more formal/literary

So شروع می‌شود is the natural choice.

می‌شود comes from the verb شدن = to become / to happen / to be done.

In this sentence, شروع می‌شود works together as a unit meaning:

• begins
• starts

So although می‌شود often means becomes, here it is part of the expression شروع شدن.

About the writing:

• می‌شود is the standard spelling with a نیم‌فاصله (half-space)
• میشود is also very common in informal typing
• Both mean the same thing

In everyday spoken Persian, می‌شود is often pronounced mishe.

Yes, فردا صبح literally means tomorrow morning.

• فردا = tomorrow
• صبح = morning

Together they function as a time expression.

This word order is very natural in Persian. English speakers sometimes expect something like morning tomorrow, but Persian usually says:

• فردا صبح = tomorrow morning
• امروز صبح = this morning / today morning
• دیروز صبح = yesterday morning

You may also hear صبح فردا, but that can sound a little more emphatic or formal depending on context. For everyday use, فردا صبح is the most common.

Persian does not have a word exactly like English the.

So امتحان can mean:

• an exam
• the exam

The exact meaning depends on context.

In this sentence, the listener probably already knows which exam is being talked about, so in English we naturally translate it as the exam.

This is very normal in Persian: nouns often appear without any article, and context tells you whether the meaning is definite or indefinite.

This is a very important Persian pattern.

After باید (must / have to), Persian typically uses the subjunctive form of the verb.

So:

• باید بخوابم = I must sleep / I have to sleep
• not normally باید می‌خوابم

Here:

• باید = must / have to
• بخوابم = subjunctive, that I sleep / I go to sleep

This is one of the most common structures in Persian:

• باید بروم = I must go
• باید بخوریم = we must eat
• باید بخواند = he/she must read

So باید + subjunctive is the rule to remember.

بخوابم comes from the verb خوابیدن = to sleep.

It is the 1st person singular subjunctive form:

• بخوابم = that I sleep / that I go to sleep

Breakdown:

• بـ = subjunctive marker
• خواب = verb stem
• ـم = I

So:

• بخوابم = I should sleep / I sleep after words like باید

In context, it is best translated as:

• I should go to bed
• I need to sleep
• I have to go to sleep

Even though the literal sense is sleep, in a sentence like this English usually says go to bed early.

زود means early, and it is an adverb.

In Persian, adverbs often come before the verb:

• زود بخوابم = sleep early / go to bed early
• خوب حرف می‌زند = speaks well
• سریع می‌آید = comes quickly

So the placement in this sentence is completely normal:

• باید زود بخوابم = I have to sleep early / go to bed early

English speakers may want to translate word-for-word, but in Persian the adverb-before-verb pattern is very common.

Persian often drops subject pronouns when the verb already shows who the subject is.

Here, بخوابم ends in ـم, which tells you the subject is I.

So Persian does not need من unless the speaker wants emphasis.

Compare:

• باید زود بخوابم = I have to go to bed early
• من باید زود بخوابم = I have to go to bed early

The second version is more emphatic, like:

• I have to go to bed early

So the pronoun is omitted because it is already clear from the verb ending.

پس means so, therefore, or then.

In this sentence it connects the two ideas:

• The exam starts tomorrow morning
• so I have to go to bed early tonight

So:

• پس = so / therefore

It is a very common linking word in Persian.

Examples:

• دیر شده، پس برویم. = It’s late, so let’s go.
• وقت ندارم، پس نمی‌آیم. = I don’t have time, so I’m not coming.

In speech, پس can sometimes also have other uses depending on tone, but here it is simply a logical so.

امشب specifically means tonight.

• ام in words like امشب and امروز refers to this / today
• شب = night
• امشب = tonight

Persian normally says:

• امشب = tonight
• امروز = today
• امسال = this year

You would not normally say امروز شب for tonight. The natural word is simply امشب.

So in this sentence:

• امشب باید زود بخوابم = Tonight I have to go to bed early

Literally, بخوابم means sleep.

But in this sentence, English usually prefers go to bed early because that is the more natural way to express the idea.

So both ideas are present:

• literal: I must sleep early tonight
• natural English: I have to go to bed early tonight

This is common in translation: the Persian verb may literally be sleep, but the most natural English equivalent in context is go to bed.

It is mostly neutral standard Persian.

• امتحان فردا صبح شروع می‌شود sounds normal and standard
• پس امشب باید زود بخوابم also sounds natural and standard

In very casual spoken Persian, someone might say:

• امتحان فردا صبح شروع می‌شه، پس امشب باید زود بخوابم
• or even ... باید زود بخوابم دیگه

But the sentence you were given is a good standard written/spoken version.

Yes. Some natural alternatives are:

• امتحان فردا صبح شروع می‌شود، بنابراین امشب باید زود بخوابم.
  More formal because of بنابراین = therefore

• فردا صبح امتحان شروع می‌شود، پس امشب باید زود بخوابم.
  Same meaning, different word order

• امتحان فردا صبحه، پس امشب باید زود بخوابم.
  More conversational; roughly The exam is tomorrow morning

• امتحان فردا صبح آغاز می‌شود، پس امشب باید زود بخوابم.
  Slightly more formal because of آغاز

So the original sentence is not the only possible version, but it is very natural and correct.