Ta śruba jest za krótka do tej półki.

Because śruba is a feminine noun in Polish.

In Polish, words like this have to agree with the noun’s gender:

• ten = masculine
• ta = feminine
• to = neuter

So:

• ta śruba = this screw

Even though English uses just this for everything, Polish changes the form.

For the same reason: krótka has to agree with śruba, which is feminine singular.

The adjective krótki means short, but it changes form depending on the noun:

• krótki = masculine
• krótka = feminine
• krótkie = neuter

So:

• śruba → feminine
• therefore: krótka

That is why the sentence says Ta śruba jest za krótka.

In this sentence, za means too, as in too short.

So:

• za krótka = too short

This is a very common Polish pattern:

• za mały = too small
• za duży = too big
• za drogi = too expensive
• za krótka = too short

So yes, za can mean different things in different contexts. Here it is not a preposition meaning location; it is an adverb-like word meaning excessively / too.

Yes. In Polish, jest is the normal present-tense form of być (to be) in sentences like this.

• Ta śruba jest krótka = This screw is short.
• Ta śruba jest za krótka = This screw is too short.

Unlike in some other Slavic languages, Polish usually does keep the present-tense verb to be.

Because the preposition do requires the genitive case.

The basic form is:

• ta półka = this shelf

But after do, both words change:

• do tej półki = for this shelf / for this bookcase shelf / belonging to this shelf contextually

So here:

• ta → tej
• półka → półki

This is one of the most important things to learn in Polish: prepositions often force a particular case.

Literally, do often means something like to, into, or for fitting/connecting to depending on context.

In this sentence, Ta śruba jest za krótka do tej półki, the idea is:

• this screw is too short for this shelf
• this screw is not suitable for attaching / assembling / fitting this shelf

So although English uses for, Polish naturally uses do here.

This is common when talking about parts that belong to or fit something:

• klucz do drzwi = key for/to the door
• pilot do telewizora = remote for the TV
• śruba do półki = screw for the shelf

Here it is singular.

That may look confusing, because półki can also be a plural form in other contexts. But in this sentence:

• półka = shelf
• do półki = of/for the shelf → genitive singular

So tej półki means of/for this shelf, not these shelves.

Polish forms often overlap, so you have to use context and grammar to tell which form it is.

Yes. Both are correct.

• za krótka = too short
• zbyt krótka = too short

The difference is mainly stylistic:

• za krótka is very common and natural in everyday speech
• zbyt krótka can sound a little more formal or careful

So:

• Ta śruba jest za krótka do tej półki.
• Ta śruba jest zbyt krótka do tej półki.

Both work.

Yes, Polish word order is more flexible than English word order, but not every version sounds equally natural.

The most neutral version is:

• Ta śruba jest za krótka do tej półki.

You might also hear variations for emphasis, but the basic sentence above is the safest one for learners.

In English, word order often shows grammar. In Polish, endings often show grammar, so word order is freer. Still, some orders sound more natural than others.

Yes.

• Ta śruba jest za krótka do tej półki. = This screw is too short for this shelf.
• Śruba jest za krótka do tej półki. = The screw / a screw is too short for this shelf.

Adding ta makes it specifically this screw. Without it, the sentence is less specific and depends more on context.

Here are the basic dictionary forms:

• ta → dictionary form usually given under ten (this)
• śruba → screw
• jest → from być (to be)
• za → too in this sentence
• krótka → from krótki (short)
• tej → another form of ten / ta / to (this)
• półki → from półka (shelf)

This is useful because Polish words often appear in changed forms, not in their dictionary forms.

Because tej is one of the declined forms of ten / ta / to (this).

For feminine nouns:

• nominative: ta półka = this shelf
• genitive: tej półki = of/for this shelf

So tej is not a different word; it is just the correct grammatical form after do.

This is similar to how English has she and her: same basic word, different grammatical form.

It can be, yes, but Polish has a few hardware words that English often groups together as screw.

For example:

• śruba = screw / bolt, often depending on context
• wkręt = screw, especially one that screws directly into material
• śrubka = small screw

In a sentence like this, śruba is perfectly normal, especially in general or practical contexts. But in a hardware store, the exact word may depend on the type of fastener.

Because Polish krótki can refer both to:

• physical length: a short screw
• duration or length of time/text: a short film, a brief message

In this sentence, since we are talking about a screw, the physical meaning is obvious:

• za krótka = too short in length

Context tells you which meaning is intended.

You would say:

• Ta śruba jest za długa do tej półki.

Here again, the adjective agrees with śruba:

• długi = long
• długa = feminine singular

So the pattern is exactly the same:

• Ta śruba jest za krótka do tej półki.
• Ta śruba jest za długa do tej półki.

A useful way to see it is:

• [demonstrative + noun] + jest + za + adjective + do + genitive

Applied here:

• Ta śruba = this screw
• jest = is
• za krótka = too short
• do tej półki = for this shelf

So the whole structure is:

• Ta śruba jest za krótka do tej półki.

This pattern is very useful and can be reused:

• Ten kabel jest za krótki do tego komputera.
• Ta sukienka jest za mała dla mnie.
• To pudełko jest za ciężkie do tej półki.

It is a good sentence model to remember.