Strategien er perfekt.

Because Danish often puts the definite article on the end of the noun.

• strategi = strategy
• strategien = the strategy

For many common-gender nouns, the definite ending is -en. So:

• en strategi = a strategy
• strategien = the strategy

This is one of the biggest differences from English, where the is a separate word.

You need to know the noun’s grammatical gender.

Strategi is a common gender noun, so it takes:

• indefinite: en strategi
• definite: strategien

If it were a neuter noun, it would usually take et in the indefinite and -et in the definite.

So the pattern is:

• common gender: en ... / ...en
• neuter: et ... / ...et

Er means is / am / are, depending on context. It is the present tense of at være (to be).

Examples:

• Jeg er træt. = I am tired.
• Du er sød. = You are kind.
• Strategien er perfekt. = The strategy is perfect.

So here, er simply means is.

This is the normal word order for a basic Danish statement:

subject + verb + complement

So:

• Strategien = subject
• er = verb
• perfekt = complement

This is very similar to English:

• The strategy
  • is
    • perfect

Danish main clauses usually place the finite verb in the second position, and in a simple sentence like this, that gives the same order as English.

Because perfekt is a predicate adjective here, not an attributive adjective before a noun.

In Strategien er perfekt, the adjective comes after er and describes the subject. In that position, Danish usually uses the basic form:

• Strategien er perfekt. = The strategy is perfect.

Compare that with an adjective directly before a noun:

• den perfekte strategi = the perfect strategy

So:

• after er: often perfekt
• before a definite noun: perfekte

Not here in the way English speakers might expect. In predicate position after er, adjectives often stay in a simple form.

Examples:

• Planen er god. = The plan is good.
• Huset er stort. = The house is big.
• Strategien er perfekt. = The strategy is perfect.

However, Danish adjectives do change in other contexts, especially before nouns. For example:

• en perfekt strategi = a perfect strategy
• den perfekte strategi = the perfect strategy

So adjective forms depend a lot on sentence position and noun type.

A rough English-friendly guide is:

• Strategien ≈ stra-teh-GEE-en
• er ≈ a short, unstressed air / uh sound, depending on accent
• perfekt ≈ pair-FEKT

A few helpful notes:

• The g in strategien is pronounced as a real g.
• The final -en in strategien is usually light and unstressed.
• er is often reduced in natural speech.
• Danish pronunciation is often softer and more reduced than spelling suggests.

If you want to sound natural, keep the stress mainly on:

• -gi- in strategien
• fekt in perfekt

Yes. It is a normal Danish word, and it is clearly related to English strategy.

The forms are:

• strategi = strategy
• strategien = the strategy

Many educated or international words look similar in Danish and English, though the pronunciation is different.

Yes, but it means something slightly different in emphasis.

• Strategien er perfekt. = The strategy is perfect.
• Den strategi er perfekt. = That strategy is perfect or That strategy is the perfect one, depending on context

So strategien is the ordinary definite noun the strategy, while den strategi often points to a specific strategy more demonstratively.

Use en perfekt strategi when you mean a perfect strategy, not the strategy is perfect.

Compare:

• Strategien er perfekt. = The strategy is perfect.
• En perfekt strategi er vigtig. = A perfect strategy is important.

The first is a full sentence with a subject and verb. The second is a noun phrase inside a bigger sentence.

So:

• perfekt after er describes something
• en perfekt strategi names a thing

Because Danish usually expresses definiteness by attaching it to the noun.

English:

• the strategy

Danish:

• strategien

This is very common in Scandinavian languages. However, Danish can also use a separate word like den, especially when an adjective comes before a definite noun:

• strategien = the strategy
• den perfekte strategi = the perfect strategy

So:

• no adjective: often just the ending
• adjective before definite noun: usually den/det/de
  • adjective + noun in definite form

It is neutral and natural. Strategien er perfekt. works in everyday Danish, business Danish, and written Danish.

It sounds straightforward and idiomatic. Depending on context, though, perfekt may sound a bit strong, just like perfect in English. In real conversation, people might also say:

• Strategien er rigtig god. = The strategy is really good.
• Strategien fungerer godt. = The strategy works well.

But grammatically, Strategien er perfekt. is completely normal.

No, not in a normal sentence like this. Danish requires an explicit subject.

So you say:

• Strategien er perfekt.

You cannot normally just say:

• Er perfekt.

That would sound incomplete, except perhaps in very informal notes or fragments. Danish is like English in this respect: the subject is usually required.