De boot vertrekt om één uur.

Because boot is a de-word in Dutch. Nouns in Dutch usually take either de or het, and this is something you often have to learn with each noun.

So:

• de boot = the boat
• not het boot

There is not always a simple rule you can guess from the meaning alone, so it is best to memorize the noun together with its article: de boot.

Vertrekken is the infinitive, meaning to depart or to leave.

In the sentence, the subject is de boot, which is third person singular, so the verb has to be conjugated:

• ik vertrek = I depart
• jij vertrekt / vertrek jij
• hij/zij/het vertrekt
• de boot vertrekt

So vertrekt is the correct finite verb form for de boot.

Here vertrekken means to depart.

It is commonly used for transportation:

• De trein vertrekt = The train departs
• Het vliegtuig vertrekt = The plane departs
• De boot vertrekt = The boat departs

It sounds a bit more formal or timetable-like than simply saying something like goes away. In travel contexts, vertrekken is very common and natural.

In Dutch, om is used before a specific clock time. It corresponds to at in English.

So:

• om één uur = at one o’clock
• om zes uur = at six o’clock
• om half acht = at half past seven

That is why the sentence says om één uur.

The accents in één show that it means the number one.

Dutch also has een without accents, which usually means a or an:

• een boot = a boat
• één uur = one o’clock

In many contexts, the accents are used to prevent confusion or to emphasize the number. So in a time expression, één uur makes it especially clear that this is one, not the article a.

Sometimes you will see een uur, and the meaning is still clear from context. However, when you specifically mean the number one, especially in a phrase like a clock time, één uur is the clearest spelling.

So:

• één uur = explicitly one o’clock
• een uur can sometimes appear too, but it may look less precise

For learners, using één for the number is a very good habit.

When telling the time in Dutch, you normally use uur:

• één uur
• twee uur
• drie uur

So even though the number changes, the standard time expression still uses uur, not uren.

Uren does exist, but it is used more as a normal plural noun meaning hours in a general sense:

• Ik werk acht uren per dag = I work eight hours per day

In everyday Dutch, even for duration, people often still say acht uur rather than acht uren.

Yes. This sentence follows the normal basic pattern:

subject + finite verb + time expression

• De boot = subject
• vertrekt = finite verb
• om één uur = time expression

So the structure is very straightforward.

Then Dutch uses verb-second word order, so the verb still has to come in the second position:

• Om één uur vertrekt de boot.

This means the same thing as De boot vertrekt om één uur, but it puts more emphasis on the time.

This is very important in Dutch: if something other than the subject comes first, the verb usually still stays in second position.

Yes, you could, and it would be understandable. It means something like The boat leaves at one o’clock.

But there is a small difference in style:

• De boot vertrekt om één uur = more standard for schedules, announcements, travel information
• De boot gaat om één uur weg = more everyday and conversational

In transport contexts, vertrekt is often the most natural choice.

A rough guide for English speakers:

• vertrekt: something like fer-TREKT

  • the v in Dutch often sounds closer to English f
  • the g is not present here, so that part is easier
  • the final t is pronounced

• één: roughly like ayn

  • longer and more clearly stressed than een

• uur: this can be tricky

  • it starts with a front rounded vowel that English does not really have
  • a rough beginner approximation is uur with rounded lips, almost like saying ee while rounding your lips

Together: De boot vertrekt om één uur
roughly: duh boat fer-TREKT om ayn uur

A teacher or audio source is especially helpful for één and uur.

It is very common for scheduled departures, especially with:

• trains
• buses
• planes
• boats

Examples:

• De trein vertrekt om negen uur.
• Het vliegtuig vertrekt morgen vroeg.
• De boot vertrekt om één uur.

So yes, it is a very normal verb in transport situations, though other verbs can also be used depending on style and context.