Σκύβω όταν δένω το κορδόνι μου.

Greek often leaves out subject pronouns when they are clear from the verb ending.

Here, σκύβω means I bend / I bend down, and δένω means I tie.
The ending -ω already shows that the subject is I, so adding εγώ would usually only be for emphasis.

So:

• Σκύβω = I bend down
• Εγώ σκύβω = I bend down with extra emphasis, like I am the one who bends down

Yes. Σκύβω usually means bend down, stoop, or lean down.
So in English, the idea of downward movement is often already built into the Greek verb.

That means Greek does not need a separate word equivalent to down here.

Examples:

• Σκύβω να πιάσω κάτι. = I bend down to pick something up.
• Σκύβω όταν δένω το κορδόνι μου. = I bend down when I tie my shoelace.

Greek uses the present tense here for a habitual or general action, just like English does in sentences such as I bend down when I tie my shoelace.

This is not about one specific moment only. It describes what normally happens.

So the pattern is:

• σκύβω = I bend down
• όταν δένω... = when I tie... / whenever I tie...

If you wanted to talk about one specific past event, the tenses would change.

Όταν usually means when, but in sentences like this it often has the broader sense of whenever.

So:

• Σκύβω όταν δένω το κορδόνι μου.
  can be understood as
  I bend down when / whenever I tie my shoelace.

This is very natural in Greek for repeated or typical actions.

Δένω means to tie, fasten, or bind, depending on context.

So it is a common verb used in several situations:

• δένω τα κορδόνια μου = I tie my shoelaces
• δένω μια σακούλα = I tie a bag
• δένω το σκοινί = I tie the rope

In your sentence, δένω is simply the normal verb for tying a lace.

Το κορδόνι μου is the normal Greek way to say my shoelace / my lace.

It breaks down like this:

• το = the (neuter singular article)
• κορδόνι = lace / cord / shoelace
• μου = my

Greek very often expresses possession with:

article + noun + possessive clitic

So:

• το βιβλίο μου = my book
• το σπίτι μου = my house
• το κορδόνι μου = my shoelace

This is one of the most basic and common Greek possessive patterns.

Yes. Μου can mean either my or to me / for me, depending on grammar and context.

Here it is possessive, so it means my:

• το κορδόνι μου = my shoelace

In other sentences it can be an object pronoun:

• Μου μιλάει. = He/She is talking to me.

So the meaning of μου depends on how it is used in the sentence.

Greek can use the singular here even where English often prefers the plural.

Το κορδόνι μου literally means my lace / my shoelace.
In context, it can refer to one lace, or more generally to the lace you are tying.

In real life, Greek speakers also commonly use the plural:

• Τα κορδόνια μου = my shoelaces

So both are possible depending on what exactly the speaker has in mind.
The singular in your sentence is completely natural.

Κορδόνι is neuter singular.

You can tell from the article το:

• ο = masculine
• η = feminine
• το = neuter

Also, many neuter nouns in Greek end in -ι, though not all nouns ending in -ι work exactly the same way.

So:

• το κορδόνι
• το παιδί
• το σπίτι

are all neuter nouns.

The sentence as given is natural and neutral:

Σκύβω όταν δένω το κορδόνι μου.

Greek word order is more flexible than English, so some changes are possible, but they may sound more marked or emphasize different parts.

For example:

• Όταν δένω το κορδόνι μου, σκύβω.
  = When I tie my shoelace, I bend down.

This version puts the when clause first, which is also very natural.

So the original word order is not the only possible one, but it is a standard, neutral choice.

A simple pronunciation guide is:

SKEE-vo OH-tan THE-no to kor-THO-nee moo

A few helpful notes:

• σκ in σκύβω sounds like sk
• υ here sounds like ee
• δ in Modern Greek sounds like the th in this
• θ in όταν and κορδόνι sounds like the th in think
• The accent marks show which syllable is stressed:
  • Σκύβω → stress on Σκύ-
  • όταν → stress on ό-
  • δένω → stress on δέ-
  • κορδόνι → stress on δό-

Yes, but it means something slightly different.

• Σκύβω όταν δένω το κορδόνι μου.
  = I bend down when I tie my shoelace.
  This describes what happens at that time.

• Σκύβω για να δέσω το κορδόνι μου.
  = I bend down in order to tie my shoelace.
  This emphasizes purpose.

So:

• όταν = when / whenever
• για να = in order to / so that

Both are natural, but they do not mean exactly the same thing.

By default, it sounds like a general habit or a usual action.

So the most natural reading is:

• I bend down when I tie my shoelace
• Whenever I tie my shoelace, I bend down

If you wanted to make it clearly about something happening right now, Greek would usually rely on context, or possibly add other words.

So this sentence is best understood as a general statement.