Έχω μάθει να μαζεύω τα τουβλάκια πριν κοιμηθεί το παιδί.

Not exactly.

έχω μάθει literally means I have learned, but in Greek it often describes a resulting state:

• I have learned
• I know how
• I’ve gotten used to
• sometimes even I’ve developed the habit of

So in this sentence, Έχω μάθει να μαζεύω... suggests something like:

• I’ve learned to pick up...
• I’ve gotten into the habit of picking up...

If you said έμαθα, that would focus more on the moment or fact of learning it.
έχω μάθει focuses more on the fact that this knowledge or habit is now part of you.

This is an aspect choice.

Greek uses two main aspects after να:

• imperfective: μαζεύω
• perfective/aorist: μαζέψω

Here, να μαζεύω is imperfective, so it presents the action as:

• repeated
• habitual
• general
• something done as a routine

So έχω μάθει να μαζεύω τα τουβλάκια means something like:

• I’ve learned to pick up the blocks
• I’ve learned to tidy away the blocks
• I’m in the habit of picking up the blocks

If you said να μαζέψω, it would sound more like learning to do a single completed action, not a recurring habit.

μαζεύω is a very common verb with several related meanings:

• collect
• gather
• pick up
• tidy away

In this sentence, with τα τουβλάκια, it most naturally means:

• pick up the blocks
• tidy up the blocks
• put the blocks away

So it is not just physically gathering them into one place; it can also imply cleaning up.

τουβλάκια is the diminutive form of τούβλα / τούβλο.

• τούβλο = brick
• τουβλάκι = little brick / block
• τουβλάκια = little bricks / blocks

In everyday speech, τουβλάκια often refers to children’s building blocks, toy bricks, or block pieces.

So this sounds natural if the sentence is about a child’s toys.

Because τα τουβλάκια is the neuter plural accusative, used here as the direct object of μαζεύω.

Breakdown:

• τα = the for neuter plural
• τουβλάκια = neuter plural noun

So:

• μαζεύω τα τουβλάκια = I pick up the blocks

The nominative and accusative forms are the same here, which is very common with neuter nouns.

Because πριν means before, and after it Greek commonly uses a subjunctive-type clause to refer to something that has not happened yet at that point.

So:

• πριν κοιμηθεί το παιδί = before the child goes to sleep / falls asleep

This is a very common Greek pattern:

• πριν φύγω
• πριν έρθει
• πριν αρχίσει

It is not formed with will the way English sometimes thinks about future meaning. Greek uses this clause structure instead.

Again, this is about aspect.

• κοιμάται is imperfective/present-like
• κοιμηθεί is perfective/aorist subjunctive form

After πριν, the perfective form is very natural when you mean a single complete event:

• before the child falls asleep
• before the child goes to sleep

If you used κοιμάται, it would suggest an ongoing state, more like while the child is sleeping, which is not the idea here.

So πριν κοιμηθεί το παιδί means before the moment when the child falls asleep.

Because κοιμάμαι belongs to a group of Greek verbs that use middle/passive-looking forms but can still have an active meaning.

So:

• κοιμάμαι = I sleep
• να κοιμηθώ = to fall asleep / to go to sleep
• κοιμηθεί = he/she/it falls asleep / goes to sleep in this clause

It is not actually passive in meaning here.
No one is being slept. It simply means the child falls asleep.

This is very common in Greek. Some verbs just use these forms naturally.

Both are possible in Modern Greek, but πριν κοιμηθεί is very common and natural.

So you may see:

• πριν κοιμηθεί το παιδί
• πριν να κοιμηθεί το παιδί

In many everyday contexts, Greek simply omits να after πριν.
That does not change the basic meaning.

So for a learner, it is useful to recognize both patterns.

Greek word order is more flexible than English word order.

So these are both possible:

• πριν κοιμηθεί το παιδί
• πριν το παιδί κοιμηθεί

The version in your sentence is very natural. Putting το παιδί after the verb is common and often sounds smooth and neutral.

Greek uses word order for rhythm, emphasis, and information flow more freely than English does.

The subject is understood from the verb ending.

• έχω μάθει = I have learned
• να μαζεύω = for me to pick up / to pick up

Since the subject stays the same, Greek does not need to repeat εγώ.

So the sentence naturally means:

• I have learned to pick up the blocks before the child falls asleep

Greek often leaves subject pronouns out unless they are needed for:

• emphasis
• contrast
• clarity

So εγώ would only be added if you wanted extra emphasis, like I’m the one who has learned to do this.

Most naturally, it means before the child falls asleep or before the child goes to sleep.

Because the verb is in the perfective form κοιμηθεί, it points to the transition into sleep, not the ongoing state of sleeping.

So the best natural understanding is:

• before the child falls asleep
• before bedtime overtakes the child

If Greek wanted to focus on the state of sleeping, it would use a different structure.

It can definitely suggest habit, not just ability.

Έχω μάθει να... can mean:

• I have learned how to...
• I have gotten used to...
• I am in the habit of...

With να μαζεύω in the imperfective aspect, the habitual sense becomes even stronger.

So the sentence can sound like:

• I’ve learned to tidy up the blocks before the child falls asleep
• I’ve gotten into the habit of doing that

That combination of έχω μάθει + imperfective να-form is one reason the sentence feels routine-based rather than one-time only.