geunyeodo nareul bojamaja bangapge useo jwosseo.

도 means also / too.

So 그녀도 means she too or she also.

It implies that someone else already did the same thing, and now she did as well. For example, if the speaker had already reacted happily, 그녀도 suggests she did too.

• 그녀 = she
• 그녀도 = she too / she also

Because 나를 is the object form: me.

In this sentence, she is the one doing the seeing, and me is the person being seen.

• 나 = I / me
• 나를 = me (object marker 를)

So:

• 그녀도 나를 보자마자 = as soon as she saw me

If you used 나는 or 내가, that would make I the subject/topic, which would not fit this structure.

보자마자 means as soon as (someone) saw or immediately upon seeing.

It is made from:

• 보다 = to see
• stem 보-
• -자마자 = as soon as

So:

• 보자마자 = as soon as [she] saw

This grammar expresses that the second action happened immediately after the first one.

In this sentence:

• 나를 보자마자 반갑게 웃어 줬어
• As soon as she saw me, she smiled warmly / happily at me

It is she.

Korean often leaves out subjects when they are understood from context. In this sentence, the subject of the main action is 그녀도 and that same subject naturally carries over to 보자마자.

So the understood structure is:

• 그녀도 나를 보자마자
  = as soon as she saw me

Not:

• as soon as I saw her

The object marker 를 on 나를 helps make this clear: me is what was seen.

반갑게 is the adverb form of 반갑다, which means something like to be glad, happy to see someone, or pleased.

• 반갑다 = to be glad to see someone
• 반갑게 = gladly / in a pleased way / warmly

So 반갑게 웃어 줬어 means she smiled in a glad, pleased, welcoming way.

It often carries the feeling of being happy to meet or see someone again.

Great question. 웃어 주다 adds the nuance of doing something for someone or in a way that benefits the other person.

• 웃었어 = she smiled
• 웃어 줬어 = she smiled at me / for me, with a sense that her smile was directed toward me and felt kind or meaningful to me

In English, we often do not translate this directly, but the nuance is important in Korean.

So 웃어 줬어 can sound more personal, warm, and relational than plain 웃었어.

줬어 is in the casual informal speech style.

It comes from:

• 주다 = to give
• past form 줬어 = gave / did for someone

In this sentence, it is part of 웃어 줬어.

This style is used with:

• close friends
• younger people
• family
• narration in a casual tone

A more polite version would be:

• 그녀도 나를 보자마자 반갑게 웃어 줬어요.

Because 주다 here is being used as a helper verb (auxiliary verb), added to the main verb 웃다.

In standard spacing, Korean usually writes the main verb and auxiliary separately:

• 웃어 주다
• 웃어 줬어

So the spacing reflects:

• 웃어 = smile
• 줬어 = did for someone

You may sometimes see 붙여 쓰는 cases in less careful writing, but 웃어 줬어 is the standard spacing.

Grammatically, yes. But in everyday spoken Korean, 그녀 is often less natural than English she.

Korean usually prefers:

• the person’s name
• a title
• or simply leaving the subject out if it is obvious

So in real conversation, people might more naturally say something like:

• 민지도 나를 보자마자 반갑게 웃어 줬어.
• or just 나를 보자마자 반갑게 웃어 줬어.

However, 그녀 does appear in:

• writing
• translations
• stories
• situations where the speaker wants to explicitly say she

So the sentence is correct, but it may sound a bit more literary or translation-like depending on context.

Because the whole sentence is in a casual style: 줬어.

• 나 = I / me (plain, casual)
• 저 = I / me (humble, polite)

Since the ending is informal, 나를 matches the tone naturally.

If you wanted a polite version, you would usually change both:

• 저를
• 웃어 줬어요

For example:

• 그녀도 저를 보자마자 반갑게 웃어 줬어요.

Yes, but the nuance would change.

-자마자 is very immediate: the moment, as soon as.

Other options might be:

• 보고 바로 = after seeing, right away
• 봤을 때 = when she saw
• 보니까 = when/as she saw

But 보자마자 is especially good when you want to emphasize that the smiling happened instantly.

So this sentence strongly suggests:

• the moment she saw me, she immediately smiled warmly

That immediacy is one of the key feelings in the sentence.