Eu plec la birou dimineața.

Yes. In Romanian, subject pronouns are often omitted because the verb ending already shows the person.

• plec = I leave / I’m leaving

So Plec la birou dimineața is completely natural.

Adding eu usually does one of these things:

• gives emphasis: I leave for the office in the morning
• creates contrast: Eu plec dimineața, dar el pleacă seara
• adds clarity if needed

So:

• Plec la birou dimineața = neutral, very natural
• Eu plec la birou dimineața = slightly more explicit or emphatic

Plec is the 1st person singular present form of a pleca.

It basically means:

• I leave
• I am leaving

In this sentence, because it is followed by la birou, it can be understood as:

• I leave for the office
• sometimes naturally translated as I go to the office

So Romanian uses a pleca from the idea of departing, while English may prefer go in translation.

Compare:

• Plec. = I’m leaving.
• Plec la birou. = I’m leaving for the office / I go to the office.

La is a very common preposition in Romanian. In this sentence, it marks the destination.

So:

• la birou = to the office

Depending on context, la can also mean at, but here with plec it is naturally understood as movement toward a place.

Examples:

• Merg la școală. = I go to school.
• Plec la gară. = I’m leaving for the train station.
• Sunt la birou. = I am at the office.

So la can mean either to or at, depending on the verb and context.

Not always. Birou can mean:

• office
• desk

The meaning depends on context.

Examples:

• Sunt la birou. = I’m at the office.
• Cartea e pe birou. = The book is on the desk.

In la birou, the meaning is normally at/to the office, not desk.

Dimineața is the form commonly used as a time expression meaning:

• in the morning
• in the mornings

It includes the definite article ending, but in this expression you should learn it as the normal adverbial form.

So:

• dimineața = in the morning

By itself, dimineață is more like the noun morning in certain constructions, but in everyday time expressions Romanian usually uses dimineața.

Examples:

• Dimineața beau cafea. = In the morning I drink coffee.
• Plec dimineața. = I leave in the morning.

By itself, it can depend on context.

This sentence can mean either:

• a habit: I go/leave for the office in the morning
• a present/future plan: I’m leaving for the office in the morning

Romanian present tense often covers both habitual and near-future meanings.

If you want to be more specific:

• în fiecare dimineață = every morning
• mâine dimineață = tomorrow morning
• azi dimineață = this morning

So the sentence as given is slightly flexible.

Yes, Romanian word order is fairly flexible.

The given order is natural and neutral:

• Eu plec la birou dimineața.

But you can also say:

• Dimineața plec la birou.
• Eu dimineața plec la birou.
• La birou plec dimineața. (more marked, depending on emphasis)

The meaning stays close, but the focus changes:

• Dimineața plec la birou emphasizes when
• Eu dimineața plec la birou can contrast with another time or another person

So the original sentence is a normal, straightforward order.

Yes, but the meaning shifts a little.

• Merg la birou dimineața. = I go to the office in the morning.
• Plec la birou dimineața. = I leave for the office in the morning.

So:

• a merge focuses on going
• a pleca focuses on leaving/departing

In many situations, both are possible, but they are not identical.

It is present tense, 1st person singular.

The verb a pleca in the present tense:

• eu plec = I leave
• tu pleci = you leave
• el/ea pleacă = he/she leaves
• noi plecăm = we leave
• voi plecați = you leave
• ei/ele pleacă = they leave

In Romanian, the present tense can express:

• something happening now
• a repeated action
• a near-future action

So plec is present tense, even if English might translate it as I’m leaving or I leave.

The letter ț is pronounced like ts in cats.

So dimineața is pronounced roughly like:

• dee-mee-NYEA-tsa

A few pronunciation notes:

• di sounds like dee
• niea is one flowing syllable area, roughly nyea
• ț = ts
• final a is a short a sound

So the key thing for English speakers is:

• ț is never like English z
• it is a clear ts sound

Not exactly.

• dimineața usually means in the morning
• de dimineață often means this morning, since morning, or can suggest early in the day, depending on context

Examples:

• Plec la birou dimineața. = I leave for the office in the morning.
• L-am văzut de dimineață. = I saw him this morning.
• Sunt aici de dimineață. = I’ve been here since morning.

So in your sentence, dimineața is the correct choice for a general time expression.

Yes, very often.

• la birou = to the office
• la serviciu = to work

They overlap, but they are not always identical:

• birou refers more specifically to the office
• serviciu refers to work/the workplace/job context

Examples:

• Plec la birou dimineața. = I leave for the office in the morning.
• Plec la serviciu dimineața. = I leave for work in the morning.

If someone works in an office, both may fit. If they do not work in an office, la serviciu may be more general.