Kalemtıraşı çantama koyup kalemi sınıfta açtım.

A useful breakdown is:

• kalemtıraşı = kalemtıraş

  • -ı
    pencil sharpener
    • definite direct object marker

• çantama = çanta

  • -m
    • -a
      bag
      • my
        • to/into
          So: into my bag

• koyup = koy-

  • -up
    put
    • linking converb
      So: putting / and then putting

• kalemi = kalem

  • -i
    pencil
    • definite direct object marker

• sınıfta = sınıf

  • -ta
    classroom
    • in/at

• açtım = aç-

  • -tı
    • -m
      open/sharpen
      • past + I
        So: I sharpened

So the structure is basically:

[the sharpener] [into my bag] [putting/after putting], [the pencil] [in the classroom] [I sharpened]

Because it is a definite direct object.

In Turkish, when the object is specific or known, it usually takes the accusative ending. Here, kalemtıraşı means the pencil sharpener / that pencil sharpener, not just a pencil sharpener in a vague sense.

Compare:

• kalemtıraş koydum = I put a pencil sharpener / some pencil sharpener
• kalemtıraşı koydum = I put the pencil sharpener

So -ı here marks specificity.

Because çantama means to/into my bag.

It has two parts added to çanta:

• -m = my
• -a = to

So:

• çanta = bag
• çantam = my bag
• çantama = to/into my bag

This is used because koymak normally takes a destination:

• masaya koymak = to put on/to the table
• çantaya koymak = to put into the bag

So kalemtıraşı çantama koyup means after putting the pencil sharpener into my bag.

Koyup comes from koymak and uses the converb ending -ıp / -ip / -up / -üp.

This form links one action to another and often means:

• and
• and then
• after doing

So koyup here means something like:

• putting it and...
• after putting it...
• having put it...

It is not fully conjugated because only the main verb of the sentence carries tense and person here. The main verb is açtım.

So Turkish often does this:

• X yapıp Y yaptım = I did X and then did Y

In this sentence:

• koyup ... açtım = I put ... and then sharpened ...

For the same reason as kalemtıraşı: it is a specific direct object.

• kalem açtım would sound like I sharpened a pencil / pencils
• kalemi açtım means I sharpened the pencil

Turkish often marks specific objects with the accusative:

• kitap okudum = I read a book
• kitabı okudum = I read the book

So kalemi tells you the pencil is definite/specific.

Because sınıfta gives location, while sınıfa would give direction.

• sınıfta = in the classroom
• sınıfa = to the classroom

Here the sharpening happened in the classroom, so Turkish uses the locative ending -da / -de / -ta / -te.

Also, it becomes -ta instead of -da because of consonant harmony: sınıf ends in the voiceless consonant f, so the suffix uses t.

So:

• sınıf
  • -ta = sınıfta

Yes, açmak often means to open, but with certain objects it has other common meanings too.

With kalem, açmak means to sharpen.

So:

• kapıyı açmak = to open the door
• televizyonu açmak = to turn on the TV
• kalemi açmak = to sharpen the pencil

This is a normal Turkish expression. Learners often find it strange because English uses a completely different verb, but in Turkish kalem açmak is standard.

It is built into the verb açtım.

The ending -m shows first person singular, so açtım means I opened/sharpened.

That is why Turkish often leaves out subject pronouns like ben when they are already clear from the verb.

So:

• Ben açtım = I sharpened it
• Açtım = I sharpened it

Both are possible, but the second is very common.

Usually, yes.

In this sentence, the natural reading is:

1. I put the pencil sharpener in my bag.
2. Then I sharpened the pencil in the classroom.

So -up often gives a sequence of actions, especially in everyday narration.

However, it can sometimes be a looser and depending on context. If you want to say strictly after doing X, Turkish can also use a more explicit structure like:

• koyduktan sonra = after putting

But here koyup is perfectly natural and already strongly suggests the order.

Because koyup is a non-finite verb form, while açtım is the main finite verb.

In Turkish, when verbs are linked with -ıp / -ip / -up / -üp, the earlier verb usually does not show person or tense separately. The last verb carries that information for the whole sequence.

So:

• koyup açtım = I put it and sharpened it
• koyup açtı = he/she put it and sharpened it
• koyup açacağız = we will put it and sharpen it

The subject is understood to be the same for both actions unless context says otherwise.

Not completely, but the given order is very natural.

Turkish word order is flexible, though the main verb often comes at the end. The sentence you have is a normal, neutral way to say it.

Current order:

• Kalemtıraşı çantama koyup kalemi sınıfta açtım.

You could move some parts for emphasis, for example:

• Kalemtıraşı çantama koyup sınıfta kalemi açtım.

That still works, but the emphasis changes slightly. Turkish often moves elements around to highlight place, object, contrast, or topic.

So the sentence is not the only possible order, but it is a very standard one.

Because the -up form often does the job of and when the same subject performs both actions.

Instead of saying something like:

• Kalemtıraşı çantama koydum ve kalemi sınıfta açtım

Turkish can make it more compact:

• Kalemtıraşı çantama koyup kalemi sınıfta açtım

This sounds smoother and more natural in many contexts. It is very common in spoken and written Turkish when one person does a chain of actions.

So -up is one of the main ways Turkish links verbs without needing ve.