seonsaengnimi yemuneul sori naeeo ilgeurago haesseoyo.

이/가 is the subject marker. Here, 선생님이 marks the teacher as the person who gave the instruction.

So the sentence is structured like:

• 선생님이 = the teacher (subject)
• 예문을 = the example sentence(s) (object)
• 소리 내어 읽으라고 했어요 = said/told someone to read aloud

If you used 선생님은, it would sound more like you are setting up the teacher as the topic, possibly with some contrast or background nuance. With 이, the sentence simply identifies who did the telling.

예문 means an example sentence or example text/sentence used for study.

을 is the object marker, showing that 예문 is what the action is being done to. In this sentence, it is what someone is supposed to read.

So:

• 예문 = example sentence
• 을 = object particle

Together, 예문을 읽다 means to read the example sentence.

Literally, 소리 내어 means something like making sound / producing sound.

It comes from:

• 소리 = sound
• 내다 = to produce, to let out
• 내어 = a connective form of 내다

So 소리 내어 읽다 means to read out loud / to read aloud.

It is a very natural Korean expression. English speakers often want to translate each part too directly, but it is best to learn 소리 내어 읽다 as a set phrase meaning read aloud.

읽으라고 is part of the grammar pattern -(으)라고 하다, which is used to report a command or instruction.

Here is the breakdown:

• 읽다 = to read
• verb stem: 읽-
• -으라고 = tells/commands someone to do something

So:

• 읽으라고 했어요 = said/told [someone] to read

This pattern is very common for reported commands:

• 먹으라고 했어요 = told [someone] to eat
• 가라고 했어요 = told [someone] to go
• 앉으라고 했어요 = told [someone] to sit

So in your sentence, the teacher gave the instruction read it aloud.

Because Korean does not make reported commands by taking the polite or casual present form and adding 라고.

For reported commands, Korean uses:

• verb stem + -(으)라고 하다

So:

• 읽다 → 읽으라고 하다 ✅
• 읽어라고 하다 ❌
• 읽어요라고 하다 ❌

This is a separate grammar pattern, not just regular quotation of a finished sentence form.

Correct — Korean often omits the person who receives the instruction if it is already understood from context.

So 선생님이 예문을 소리 내어 읽으라고 했어요 means:

• The teacher told someone to read the example sentence aloud

That someone could be:

• me
• us
• the students
• a particular student

If you want to state it clearly, you could add it:

• 선생님이 저한테 예문을 소리 내어 읽으라고 했어요.
  = The teacher told me to read the example sentence aloud.

• 선생님이 학생들에게 예문을 소리 내어 읽으라고 했어요.
  = The teacher told the students to read the example sentence aloud.

Good question. Since 선생님 is a respected person, many learners expect an honorific verb form.

In Korean, if you want to show respect toward the teacher as the subject, you can say:

• 선생님께서 예문을 소리 내어 읽으라고 하셨어요.

That is more explicitly respectful.

But 선생님이 ... 했어요 is still something you may hear in everyday speech, especially depending on:

• the speaker’s age
• the situation
• how formal the conversation is
• regional and personal speaking habits

So the original sentence is grammatical and natural, but a more respectful version is also possible.

Both can work in many situations, and both often mean something like out loud.

• 소리 내어 읽다
• 소리 내서 읽다

Both are natural.

The -어 form in 내어 can sound a little more written or slightly more formal/literary, while 내서 is very common in everyday speech.

So in practice:

• 소리 내어 읽으세요 = please read aloud
• 소리 내서 읽으세요 = please read aloud

The meaning is basically the same here.

This is a very common pronunciation question because 읽다 is tricky.

In 읽으라고, the 읽 is followed by a vowel sound in 으, so it is pronounced roughly like:

• 일그라고

More precisely, learners often hear it close to [일그라고].

That happens because the final consonants in 읽 are not pronounced exactly the way they are written when followed by another sound.

So:

• 읽다 is often heard roughly as 익따 in isolation
• 읽어요 sounds like 일거요
• 읽으라고 sounds like 일그라고

This is normal Korean sound change.

Korean word order is somewhat flexible, especially with adverbial phrases like 소리 내어.

The original order is very natural:

• 선생님이 예문을 소리 내어 읽으라고 했어요.

Because 소리 내어 modifies 읽다, it is placed right before 읽으라고. That is the most straightforward and natural placement.

You may see slight variations in longer sentences, but for learners, the safest pattern is:

• object + adverb + verb

So here:

• 예문을 = object
• 소리 내어 = adverbial phrase
• 읽으라고 했어요 = verb phrase

That is the best order to remember.