Ni metas la vestojn en la ŝrankon, sed ŝi lasas unu tirkeston por libroj.

They do not all have -n for exactly the same reason.

• vestojn = the direct object of metas
  We are putting the clothes, so the clothes receive the action.

• tirkeston = the direct object of lasas
  She leaves one drawer, so one drawer receives the action.

• ŝrankon = not the direct object, but a noun showing direction after en
  en la ŝrankon means into the wardrobe/cabinet, with movement toward the inside.

So Esperanto uses -n both for:

• direct objects
• direction toward a place

That is one of the most important uses of -n.

Because en + -n shows motion into something.

• en la ŝranko = in the wardrobe/cabinet
• en la ŝrankon = into the wardrobe/cabinet

In this sentence, the clothes are being moved from somewhere else to the inside of the wardrobe, so Esperanto uses en la ŝrankon.

This is a very common pattern:

• Mi estas en la ĉambro = I am in the room
• Mi iras en la ĉambron = I go into the room

English often uses a different preposition, like into, but Esperanto often uses en plus the accusative -n.

Because unu here is a numeral, and simple numerals normally do not take -n.

So you say:

• unu tirkesto
• unu tirkeston
• du libroj
• du librojn

The noun gets the ending, not the numeral.

Here, tirkeston gets -n because it is the direct object of lasas, but unu stays unu.

Because la marks something definite or specific.

• la vestojn = the clothes, probably a specific set of clothes already understood from context
• la ŝrankon = the wardrobe/cabinet, a specific one
• por libroj = for books, in a general sense

So por libroj means the drawer is intended for books in general, or for storing books.

If you wanted to talk about specific books, you could say:

• por la libroj = for the books

Also remember that Esperanto has no separate word for a/an, so unu tirkeston can often feel like one drawer or sometimes simply a drawer, depending on context.

Por means for, usually in the sense of purpose, intended use, benefit, or destination.

So ŝi lasas unu tirkeston por libroj means she leaves one drawer:

• to be used for books
• reserved for books
• intended for books

It does not mean she is physically giving the drawer to the books. It means the drawer is meant for storing books.

They are two different actions:

• meti = to put, place, set
• lasi = to leave, let

In this sentence:

• Ni metas la vestojn en la ŝrankon
  We are actively putting the clothes into the wardrobe.

• sed ŝi lasas unu tirkeston por libroj
  But she leaves one drawer for books.

Here lasi means something like leave available, leave unused for something else, or set aside.

Because -as is the present tense ending in Esperanto.

So:

• metas = put / are putting
• lasas = leaves / is leaving

The basic verb endings are:

• -i = infinitive, like meti, lasi
• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command/wish

So this sentence is in the present tense.

Yes. Tirkesto is a compound word:

• tir- = pull
• kesto = box
• -o = noun ending

So literally it is something like pull-box, which is a very natural Esperanto way to say drawer.

This is a good example of how Esperanto builds words from smaller parts. Once you know the pieces, many words become easier to remember.

Ŝranko is a somewhat broad word. Depending on context, it can mean:

• wardrobe
• cabinet
• cupboard
• closet-like storage unit

In this sentence, because it contains clothes and also has a drawer, wardrobe or cabinet is probably the best fit.

As often happens in Esperanto, the exact English translation depends on context.

Yes, Esperanto word order is fairly flexible, but this sentence uses a very normal, neutral order:

• Ni metas la vestojn en la ŝrankon
• sed ŝi lasas unu tirkeston por libroj

That is basically:

• subject
• verb
• object
• other information

Because Esperanto marks objects with -n, you can often move parts around for emphasis. For example:

• La vestojn ni metas en la ŝrankon

This is still understandable, but it emphasizes the clothes more strongly.

For learners, the original word order is the safest and most natural choice.

A few useful pronunciation points:

• ŝ sounds like English sh
• ŝi sounds like shee
• j in Esperanto sounds like English y
• oj sounds roughly like oy

So:

• ŝi ≈ shee
• libroj ≈ LEE-broy
• ŝrankon begins with shr-, like shr in English shrink, though the vowels are clearer and more regular in Esperanto

Esperanto spelling is very consistent, so once you learn each letter sound, pronunciation becomes much easier than in English.