No encuentro la bicicleta en ninguna parte.

In Spanish, the basic way to make a verb negative is to put no directly before the conjugated verb.

• encuentro = I find / I am finding
• no encuentro = I don't find / I can't find

So:

• Encuentro la bicicleta = I find the bicycle.
• No encuentro la bicicleta = I can't find the bicycle.

That is the normal Spanish word order for simple negation.

Encuentro is the first person singular present tense of encontrar.

The verb encontrar is a stem-changing verb:

• encontrar
• encuentro
• encuentras
• encuentra
• encontramos
• encontráis
• encuentran

The o in the stem changes to ue in most present-tense forms, including yo.

So:

• yo encuentro = I find
• not yo encontro

Also, la here is not attached to the verb. It is the article belonging to bicicleta:

• la bicicleta = the bicycle

Spanish often uses an article where English might not, especially when referring to a specific known thing.

• la bicicleta = the bicycle

Here, the speaker is talking about a particular bicycle, not bicycles in general.

If you just said No encuentro bicicleta, it would sound incomplete or unnatural in most normal contexts unless you meant something more general, like I can't find any bicycle.

A learner may also wonder about mi bicicleta. That is possible too:

• No encuentro mi bicicleta = I can't find my bicycle

But la bicicleta is fine if the bicycle is already understood from context.

En ninguna parte means nowhere or literally in no place.

It is a common expression:

• parte = part, place, area (depending on context)
• ninguna parte = no place
• en ninguna parte = nowhere / in no place

So the sentence is literally something like:

• I can't find the bicycle in no place

But natural English is:

• I can't find the bicycle anywhere
• I can't find the bicycle nowhere would be wrong in standard English, but it is normal in Spanish to combine negatives this way.

Yes. Spanish commonly uses negative concord, which means multiple negative words can appear together in the same sentence.

Here you have:

• no
• ninguna

So:

• No encuentro la bicicleta en ninguna parte.

This is completely correct Spanish.

In English, standard grammar usually avoids this kind of structure:

• I don't find it nowhere is nonstandard in English.

But in Spanish, it is normal and expected:

• No veo nada. = I don't see anything.
• No conozco a nadie. = I don't know anyone.
• No voy nunca. = I never go.
• No encuentro la bicicleta en ninguna parte. = I can't find the bicycle anywhere.

Yes. Por ninguna parte is also very common, and many speakers might even prefer it in everyday speech.

Compare:

• en ninguna parte
• por ninguna parte

Both can mean nowhere / anywhere in this context.

A very natural colloquial version is:

• No encuentro la bici por ninguna parte.

That sounds especially everyday and conversational.

So the sentence you were given is correct, but there are other natural ways to say the same thing.

La bicicleta is the full word: bicycle.

La bici is the common shortened form, like saying bike instead of bicycle in English.

So:

• No encuentro la bicicleta en ninguna parte.
• No encuentro la bici en ninguna parte.

Both are correct.
La bici is more informal and more common in everyday conversation.

Yes, but the original order is the most neutral and natural:

• No encuentro la bicicleta en ninguna parte.

You may also hear or see:

• No encuentro en ninguna parte la bicicleta.
• En ninguna parte encuentro la bicicleta.

These are grammatically possible, but they can sound more marked, literary, or emphatic depending on context.

For most learners, the safest default is the original version:

• No encuentro la bicicleta en ninguna parte.

Because the expression is built with a preposition:

• en ninguna parte = in no place / nowhere

Spanish often uses fixed prepositional expressions where English uses a single adverb like anywhere or nowhere.

So you should learn en ninguna parte as a chunk.

You do not normally say just:

• No encuentro la bicicleta ninguna parte. ❌

You need the preposition:

• No encuentro la bicicleta en ninguna parte. ✔️

Ninguna is the feminine singular form of ninguno, meaning no / not any.

It agrees with parte, which is a feminine noun:

• ningún libro = no book
• ninguna casa = no house
• ninguna parte = no place / no part

So it is feminine because parte is feminine.

Also note:

• before a masculine singular noun, ninguno usually becomes ningún
• before a feminine singular noun, it stays ninguna

In standard Peninsular Spanish pronunciation, a rough guide would be:

No encuentro la bicicleta en ninguna parte
no en-KWEN-tro la bi-thi-KLE-ta en nin-GU-na PAR-te

A few useful points for Spain:

• encuentro has the stress on -cuen-
• bicicleta has the stress on -cle-
• In most of Spain, c before i is pronounced like th in thin, so bicicleta sounds like bi-thi-KLE-ta
• ninguna has a hard g sound because it comes before u

This pronunciation note depends on the region, but that is the usual model for Spain.

Yes. That is also correct:

• No encuentro la bicicleta en ninguna parte.
• No puedo encontrar la bicicleta.

Both are natural, but there is a slight difference in feel:

• No encuentro... = I can't find...
• No puedo encontrar... = I am unable to find...

The first is usually more direct and everyday for this situation.
The second can sound a little more explicit or emphatic.

If you want to keep the idea of anywhere, you could also say:

• No puedo encontrar la bicicleta en ninguna parte.

That is perfectly good Spanish too.