Giuro che è vero.

In Italian, the subject pronoun is often left out because the verb ending already shows who is doing the action.

• giuro = I swear
• the -o ending tells you it is first person singular

So Giuro che è vero naturally means I swear that it’s true.

You can say Io giuro che è vero, but adding io gives extra emphasis, like:

• I swear it’s true
• I myself swear it’s true

Most of the time, the version without io sounds more natural.

Giuro is the first-person singular present indicative of the verb giurare (to swear).

A few present-tense forms are:

• io giuro = I swear
• tu giuri = you swear
• lui/lei giura = he/she swears
• noi giuriamo = we swear
• voi giurate = you all swear
• loro giurano = they swear

In this sentence, giuro means I swear in the present tense.

Here, che means that and introduces the clause è vero.

So the structure is:

• Giuro = I swear
• che = that
• è vero = it is true

Literally: I swear that it is true.

In English, that is often optional:

• I swear it’s true
• I swear that it’s true

In Italian, che is normally included in this kind of sentence.

This is a very important spelling point.

• è = is (from the verb essere, to be)
• e = and

So:

• è vero = it is true
• e vero would be incorrect here

The accent helps distinguish the verb from the conjunction.

Italian often leaves out subject pronouns when they are understood from context. In è vero, the subject is an implied it.

English requires it in it is true, but Italian does not need a separate word here.

So:

• è vero = it’s true

This is very common with expressions about facts, weather, and general statements.

Because the sentence needs an adjective, not an adverb.

• vero = true (adjective)
• veramente = really / truly (adverb)

So:

• è vero = it is true
• è veramente... = it is really...

For example:

• È vero. = It’s true.
• È veramente importante. = It’s really important.

You would not use veramente as a direct replacement for vero here.

Yes, it is natural and correct. It sounds like a direct, emphatic way to insist something is true.

Depending on tone and context, it can sound:

• serious
• emotional
• defensive
• reassuring

Similar natural alternatives include:

• Te lo giuro. = I swear to you.
• Giuro che sto dicendo la verità. = I swear I’m telling the truth.
• È vero, lo giuro. = It’s true, I swear.

Usually, yes: giuro is fairly strong and emphatic. It is used when the speaker wants to sound sincere or convincing.

However, like English I swear, it can also be used more casually in conversation, depending on tone.

For example:

• serious: Giuro che non l’ho fatto. = I swear I didn’t do it.
• casual/emphatic: Giuro, è bellissimo! = I swear, it’s beautiful!

So the strength depends a lot on the situation and tone of voice.

Yes. Lo giuro means I swear it or more idiomatically I swear.

• Lo refers to something already understood from context
• giuro = I swear

Compare:

• Giuro che è vero. = I swear that it’s true.
• Lo giuro. = I swear it. / I swear.

Both are common, but Giuro che è vero is more explicit because it says exactly what is being sworn.

A simple pronunciation guide is:

JOO-ro keh eh VEH-ro

More carefully:

• Giuro → roughly JOO-ro
• che → keh
• è → eh
• vero → VEH-ro

A few details:

• gi before u gives a soft j sound, like English j in job
• che has a hard k sound, not ch as in chair
• vero has a rolled or tapped r in careful Italian pronunciation

Yes, but the original order is the most straightforward.

Standard order:

• Giuro che è vero.

Possible alternatives for emphasis:

• È vero, giuro. = It’s true, I swear.
• Che è vero, giuro. = That it’s true, I swear.
  This is more marked and depends on context.

So while Italian allows some flexibility, Giuro che è vero is the clearest and most neutral version.