naeil siheomiraseo jigeum ginjangdwaeyo.

In this sentence, 시험 is a noun meaning exam.
The ending -이라서 / -라서 is attached to nouns to mean because it is... or since it is....

So:

• 시험 = exam
• 시험이라서 = because it’s an exam / because I have an exam

In natural English, we often translate this more smoothly as because I have an exam tomorrow rather than the more literal because it is an exam tomorrow.

Because 시험 ends in a consonant, Korean uses -이라서. If a noun ends in a vowel, it usually takes -라서 instead.

Korean very often leaves out the subject when it is already clear from context.

So even though the sentence does not say 저는 (I), the meaning is understood as:

• (저는) 내일 시험이라서 지금 긴장돼요.
• (I) am nervous now because I have an exam tomorrow.

This is extremely normal in Korean. If the speaker is talking about their own feelings, listeners usually understand that the hidden subject is I.

Yes, literally it is something like tomorrow exam, but in natural English you would understand it as:

• I have an exam tomorrow
• There’s an exam tomorrow

Korean often uses a very compact style and leaves out words that English would require.
So 내일 시험이라서 is a natural Korean way to express the idea because I have an exam tomorrow.

Because 내일 already tells you that the exam is in the future.

Korean does not always need an extra future marker when a time word makes the meaning clear.

So:

• 내일 시험 = exam tomorrow / an exam is tomorrow
• no separate will-type word is necessary

This is very common in Korean. Time expressions often do a lot of the work.

긴장되다 means to become nervous, to feel tense, or to be nervous.

So:

• 긴장돼요 = I’m nervous / I feel tense

You may also see 긴장하다, which means to be nervous or to feel nervous too. In everyday speech, both 긴장해요 and 긴장돼요 can be used, but 긴장돼요 often sounds a little more like nervousness is happening to me / I’m getting tense.

So in this sentence:

• 지금 긴장돼요 = I’m nervous now

It’s a very natural expression.

지금 means now.

So the sentence emphasizes that the speaker is nervous at this moment:

• 내일 시험이라서 지금 긴장돼요.
• I’m nervous now because I have an exam tomorrow.

Yes, you can remove 지금:

• 내일 시험이라서 긴장돼요.
• I’m nervous because I have an exam tomorrow.

That still sounds natural. 지금 just makes the timing more explicit.

Korean very often puts the reason first and the result second.

So the structure is:

• 내일 시험이라서 = because I have an exam tomorrow
• 지금 긴장돼요 = I’m nervous now

This order is extremely natural in Korean:

reason + result

English can do this too:

• Because I have an exam tomorrow, I’m nervous now.

But English also often says:

• I’m nervous now because I have an exam tomorrow.

Both languages allow similar ideas, but Korean very commonly builds the sentence from left to right like this.

Very often, yes. -이라서 / -라서 commonly gives a reason or cause when attached to a noun.

Examples:

• 학생이라서 바빠요. = Because I’m a student, I’m busy.
• 주말이라서 사람이 많아요. = Because it’s the weekend, there are many people.
• 시험이라서 긴장돼요. = Because it’s an exam / because I have an exam, I’m nervous.

So in your sentence, -이라서 is the part that connects exam tomorrow to feeling nervous now.

긴장돼요 is in the polite informal style, often called the -요 form.

That means it is polite and very common in everyday conversation.

Compare:

• 긴장돼요 = polite
• 긴장돼 = casual/plain everyday speech to someone close
• 긴장됩니다 = more formal

So this sentence is polite and natural for many normal situations.

A natural pronunciation would be close to:

• 내일 → sounds roughly like 내일
• 시험이라서 → roughly 시허미라서
• 지금 → 지금
• 긴장돼요 → roughly 긴장돼요 or 긴장뒈요 depending on how you hear it

A smoother full pronunciation is something like:

내일 시허미라서 지금 긴장돼요.

The biggest thing learners often notice is that 시험 is commonly pronounced more like 시험 in connected speech.

Yes, you can. That is also natural.

Compare:

• 내일 시험이라서 지금 긴장돼요.
• 내일 시험이 있어서 지금 긴장돼요.

Both can mean I’m nervous now because I have an exam tomorrow.

A small nuance:

• 시험이라서 focuses on the fact that it’s exam time / it’s an exam situation
• 시험이 있어서 focuses more directly on there being an exam

In everyday conversation, both are fine, and the difference is not huge here.

Yes, the Korean is somewhat flexible.

Depending on context, 내일 시험이라서 can be understood as:

• because I have an exam tomorrow
• because tomorrow is the exam
• because it’s exam day tomorrow

In real conversation, listeners usually interpret it as the speaker has an exam tomorrow unless context suggests something else.

The sentence breaks down like this:

• 내일 = tomorrow
• 시험이라서 = because I have an exam / because it’s an exam
• 지금 = now
• 긴장돼요 = am nervous

So the overall pattern is:

time + reason + time + feeling

Or more simply:

Tomorrow exam-because now nervous-am.

That may sound unusual in English, but it is a normal Korean sentence structure. The most important thing is that the verb or predicate comes at the end: 긴장돼요.