Mi metas la novan vestaĵon en la valizon antaŭ la vojaĝo.

Metas is the present-tense form of the verb meti, meaning to put or to place.

Esperanto verb endings are very regular:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command / volitive
• -i = infinitive

So:

• Mi metas = I put / I am putting
• Mi metis = I put / I was putting
• Mi metos = I will put

Even if English might use I am putting, Esperanto often just uses the simple present.

The -n shows the direct object of the verb.

In this sentence, the thing being put is la novan vestaĵon. That is what receives the action of metas.

• Mi metas ion = I put something
• Here, that something is la novan vestaĵon

So:

• vestaĵo = a garment / an item of clothing
• vestaĵon = a garment / an item of clothing as a direct object

This is called the accusative ending.

Adjectives in Esperanto must agree with the nouns they describe.

Since vestaĵon is:

• singular
• accusative

the adjective nova must match it:

• nova vestaĵo = a new garment
• novan vestaĵon = a new garment as direct object

This matching happens with both:

• -j for plural
• -n for accusative

Examples:

• nova vestaĵo
• novaj vestaĵoj
• novan vestaĵon
• novajn vestaĵojn

This is a very important Esperanto pattern.

After a preposition, -n can show movement toward a place.

So:

• en la valizo = in the suitcase (location)
• en la valizon = into the suitcase (direction / motion)

Because the sentence is about putting something into the suitcase, Esperanto uses en + -n:

• Mi metas la novan vestaĵon en la valizon = I put the new garment into the suitcase

If the clothing were already there, you would say:

• La nova vestaĵo estas en la valizo = The new garment is in the suitcase

Because en means in / into, while al means to in the sense of toward a person, place, or target.

Compare:

• Mi metas ĝin en la valizon = I put it into the suitcase
• Mi donas ĝin al ŝi = I give it to her

With containers, Esperanto usually uses en for going inside something.

So en la valizon is natural because the clothing is being moved to the inside of the suitcase.

Because antaŭ la vojaĝo is a prepositional phrase, and here antaŭ simply marks time: before the trip.

Normally, nouns after prepositions do not take -n unless there is some special reason, such as direction.

So:

• antaŭ la vojaĝo = before the trip

There is no direct-object role here, and no directional -n, so vojaĝo stays without -n.

Vestaĵo means a piece of clothing, a garment, or an article of clothing.

It comes from:

• vesti = to dress
• vestaĵo = a clothing item / garment

The suffix -aĵ- often means a concrete thing made from or associated with the root idea.

So here:

• root idea: vest- = clothing / dressing
• vestaĵo = a clothing item

It is often more natural in English to translate it as:

• garment
• article of clothing
• sometimes simply clothes, depending on context

La is the Esperanto definite article, meaning the.

It does not change for gender, number, or case. It is always just la.

In this sentence:

• la novan vestaĵon = the new garment
• la valizon = the suitcase
• la vojaĝo = the trip

Esperanto uses la when the speaker is referring to something definite or identifiable in context, just like English uses the.

Unlike English, Esperanto has:

• la = the
• no separate word for a/an

So vestaĵo alone can mean a garment or just garment depending on context, while la vestaĵo means the garment.

Yes, Esperanto word order is fairly flexible because endings show the grammatical roles.

This sentence has a very normal order:

• Mi = subject
• metas = verb
• la novan vestaĵon = direct object
• en la valizon = destination
• antaŭ la vojaĝo = time phrase

But other orders are possible, especially for emphasis. For example:

• Antaŭ la vojaĝo mi metas la novan vestaĵon en la valizon.
• En la valizon mi metas la novan vestaĵon antaŭ la vojaĝo.

These are still understandable because:

• -n marks the object
• en la valizon shows movement into the suitcase

That said, the original order is the most straightforward for learners.

Here it means time: before the trip.

But antaŭ can also mean physical position:

• La valizo estas antaŭ la pordo. = The suitcase is in front of the door.

So antaŭ can mean either:

• before in time
• in front of in space

The context tells you which meaning is intended. In this sentence, la vojaĝo is an event, so the time meaning is the natural one.

Yes. Meti is a general verb meaning to put or to place. It is correct here.

But Esperanto also has more specific verbs such as:

• enpaki = to pack in / to pack
• pak(i) = to pack

So depending on nuance, someone might also say:

• Mi enpakas la novan vestaĵon antaŭ la vojaĝo.

That sounds more specifically like I pack the new garment before the trip.

The original sentence with metas is perfectly grammatical and simply focuses on the act of putting the item into the suitcase.

You would add -j to the noun and make the adjective match, and if the noun is still a direct object, it also keeps -n.

For example:

• Mi metas la novajn vestaĵojn en la valizon antaŭ la vojaĝo.

Breaking that down:

• novaj = new, plural
• vestaĵoj = garments / clothes, plural
• novajn vestaĵojn = plural direct object

This is a good example of Esperanto agreement:

• adjective matches noun in number and case
• direct objects take -n

It can be either, depending on context.

Esperanto does not normally make the same continuous/non-continuous distinction that English does. The present tense -as can cover both:

• I put
• I am putting

So Mi metas la novan vestaĵon en la valizon could mean either:

• I put the new garment into the suitcase
• I am putting the new garment into the suitcase

If the surrounding context matters, it will usually make the meaning clear.