Tu comentario me dio una mala impresión.

Because tu without an accent is a possessive adjective meaning your.

• tu comentario = your comment
• tú with an accent is the subject pronoun you

So:

• Tu comentario... = Your comment...
• Tú comentas... = You comment...

This is a very common spelling distinction in Spanish.

Here, me means to me. It is an indirect object pronoun.

So Tu comentario me dio una mala impresión literally works like:

• Tu comentario = your comment
• me dio = gave me
• una mala impresión = a bad impression

Very literally: Your comment gave me a bad impression.

In natural English, we would usually say Your comment gave me a bad impression or Your comment left me with a bad impression.

Spanish often uses dar una impresión to express the effect something has on someone.

So dar una mala impresión means something like:

• to give a bad impression
• to make a bad impression
• to leave someone with a bad impression

It is a normal, natural expression in Spanish.

Dio is the preterite form of dar and refers to a completed event in the past.

• me dio = it gave me
• me daba would suggest something more repeated, ongoing, or descriptive in the past
• me ha dado is the present perfect, used differently depending on context and region

In this sentence, dio fits because the speaker is talking about a specific past reaction to the comment.

It comes from the verb dar, which means to give.

A few useful forms:

• dar
• doy = I give
• da = he/she gives
• dio = he/she gave

In your sentence, the subject is Tu comentario, so dio means your comment gave.

Because the subject is Tu comentario, which is singular.

• Tu comentario = singular
• therefore dio = singular past form

If the subject were plural, the verb would also be plural:

• Tus comentarios me dieron una mala impresión = Your comments gave me a bad impression

Because impresión is a feminine noun.

So the article and adjective must agree with it:

• una = feminine singular
• mala = feminine singular
• impresión = feminine singular noun

That is why you get:

• una mala impresión

not:

• un mal impresión

Because malo/mala must agree with the noun it describes.

• impresión is feminine
• so the adjective must be mala

Compare:

• un mal comentario = a bad comment
• una mala impresión = a bad impression

You may already know mal as an adverb meaning badly, but here we need an adjective describing a noun, so agreement matters.

Comentario usually means comment, remark, or sometimes statement, depending on context.

In this sentence, your comment or your remark are the best translations.

It refers to something someone said, not necessarily a written online comment only.

Yes, it is natural and correct.

It sounds like a fairly neutral or standard way to say that someone's comment created a negative impression.

Depending on tone and context, a native speaker might also say things like:

• Tu comentario me causó una mala impresión
• Tu comentario no me gustó
• Lo que dijiste me dio mala espina (more idiomatic, but slightly different in meaning)

Still, your sentence is perfectly normal.

Yes, but the original order is the most straightforward and neutral:

• Tu comentario me dio una mala impresión.

Spanish allows some flexibility, but not every change sounds equally natural. For example:

• Me dio una mala impresión tu comentario.

This is possible, but it sounds more marked or stylistic, as if you are emphasizing tu comentario at the end.

For learners, the original version is the best one to use.

Because object pronouns like me, te, le, nos normally go before a conjugated verb in Spanish.

So:

• me dio = gave me
• te dio = gave you
• le dio = gave him/her

You do not say dio me in standard Spanish.

Yes. Tu comentario uses the informal your, so it is directed at someone you would address as tú.

If you wanted a formal version, you would say:

• Su comentario me dio una mala impresión.

That would mean Your comment gave me a bad impression when speaking formally to one person.

Because the stress falls on the last syllable: im-pre-SIÓN.

Spanish spelling rules say that a word ending in n, s, or a vowel is normally stressed on the second-to-last syllable unless there is a written accent. Since impresión is stressed on the last syllable and ends in n, it needs the accent mark.

No. It is correctly written dio, without an accent.

Learners sometimes expect dió, but that is not standard Spanish spelling.

So the correct form is:

• dio

not:

• dió

A simple pronunciation guide would be:

too koh-men-TAH-ryoh meh DYOH OO-nah MAH-lah eem-preh-SYON

A more Spain-oriented pronunciation note:

• comentario = stress on ta
• dio = one syllable
• impresión = stress on the last syllable

If you want to sound more natural, keep the rhythm smooth:

Tu comentario | me dio | una mala impresión.

In standard Spanish, una sounds better and is the normal choice here:

• me dio una mala impresión

Without the article, the sentence sounds incomplete or unnatural in most contexts.

So for learners, it is best to keep una.

Not necessarily. It usually means that something created a negative impression or did not make a good impression.

Depending on context, it can range from:

• mildly negative: That didn’t sound good to me
• more serious: That made me think badly of the situation/person

So it does not always mean something extreme; it often just means a clearly unfavorable impression.