Der Hund wirkt heute aggressiv.

The dog seems aggressive today.

Breakdown of Der Hund wirkt heute aggressiv.

• der Hund: the dog
• heute: today
• wirken: to seem
• aggressiv: aggressive

Questions & Answers about Der Hund wirkt heute aggressiv.

What does wirkt mean in this sentence, and how is it different from ist?

In Der Hund wirkt heute aggressiv, wirkt means something like seems / appears / comes across / gives the impression.

• Der Hund ist heute aggressiv = The dog *is aggressive today* (stating a fact).
• Der Hund wirkt heute aggressiv = The dog *seems / appears aggressive today* (it’s your impression, based on how he behaves or looks).

So wirken makes the statement a bit more subjective and less definite than sein (ist).

What is the basic meaning and pattern of the verb wirken?

Wirken can mean:

• to seem / to appear (in terms of effect or impression),
• to have an effect,
• sometimes to work / to act (in more formal or older usage).

In this sentence it follows the pattern:

• Subjekt + wirken + Adjektiv
• Der Hund (subject) + wirkt (verb) + aggressiv (adjective)
  → The dog seems aggressive.

Other examples:

• Er wirkt müde. – He seems tired.
• Sie wirkt sehr freundlich. – She comes across as very friendly.

Why is it Der Hund and not something like Den Hund or Dem Hund?

Because Der Hund is the subject of the sentence, and subjects in German are in the nominative case.

• der Hund = nominative singular masculine
• den Hund = accusative singular masculine
• dem Hund = dative singular masculine

Here, the dog is the one who seems aggressive, so it must be nominative:

• Der Hund wirkt heute aggressiv. – The dog seems aggressive today.

What case is Der Hund, and how can I recognize it?

Der Hund is nominative singular masculine.

Clues:

• It’s at the start of the sentence, in the typical subject position.
• The article der is the nominative masculine definite article.
• The verb wirkt agrees with a third‑person singular subject.

So:

• Wer wirkt heute aggressiv? (Who seems aggressive today?)
  → Der Hund.
  That question (with wer) also tells you the answer must be nominative.

Why does aggressiv have no ending (like aggressive would in English)? Shouldn’t it be something like aggressive or aggressiver?

Aggressiv here is a predicate adjective after a verb (wirkt), not directly in front of a noun.

In German:

• Attributive adjective (before a noun): takes endings
  
  • ein aggressiver Hund, der aggressive Hund
• Predicate adjective (after verbs like sein, wirken, bleiben, werden): no ending

So:

• Der Hund ist aggressiv.
• Der Hund wirkt aggressiv.

In both cases, aggressiv stays in its base form, with no extra ending.

What tense is wirkt, and how would I conjugate wirken in the present tense?

Wirkt is present tense, third person singular.

Present tense of wirken:

• ich wirke – I seem / I have an effect
• du wirkst – you seem (informal singular)
• er / sie / es wirkt – he / she / it seems
• wir wirken – we seem
• ihr wirkt – you (plural, informal) seem
• sie wirken – they seem
• Sie wirken – you (formal) seem

So Der Hund wirkt heute aggressiv = The dog seems aggressive today (now / these days).

Can I change the position of heute? Is Heute wirkt der Hund aggressiv also correct?

Yes, you can move heute, and Heute wirkt der Hund aggressiv is perfectly correct.

Some common options:

1. Der Hund wirkt heute aggressiv.
   – Neutral, very common word order.

2. Heute wirkt der Hund aggressiv.
   – Emphasizes today (compared to other days). Also fine; the finite verb wirkt stays in the second position, as required in German main clauses.

3. Der Hund wirkt aggressiv heute.
   – Possible but sounds more marked or stylistically unusual; in simple sentences, Germans usually don’t put heute at the end like this.

The safest and most natural are 1 and 2.

Why does the verb wirkt appear in the second position in the sentence?

German main clauses follow the V2 rule (Verb-second):

• The conjugated verb (here wirkt) must be the second element in the clause.
• The first element can be the subject, an adverb, an object, etc.

Examples:

• Der Hund (1st element) wirkt (2nd element) heute aggressiv (rest).
• Heute (1st element) wirkt (2nd element) der Hund aggressiv (rest).

So wirkt is second, even though it’s the first verb in the sentence.

How would I negate this sentence? Where does nicht go?

You would say:

• Der Hund wirkt heute nicht aggressiv.
  – The dog doesn’t seem aggressive today.

Placement:

• nicht usually comes before the word or phrase it negates.
• Here it negates the adjective aggressiv, so it comes directly before it, after heute.

Compare:

• Der Hund wirkt heute aggressiv.
• Der Hund wirkt heute nicht aggressiv.

What’s the difference between wirken, aussehen, and scheinen in sentences like this?

All three can express an impression, but with slightly different nuances:

• wirken – how someone/something comes across / affects you overall

  • Der Hund wirkt aggressiv. – He comes across as aggressive (from behavior, posture, etc.).

• aussehen – how someone/something looks (visually)

  • Der Hund sieht aggressiv aus. – He looks aggressive (visually).

• scheinen – seems / appears but often sounds a bit more formal or abstract

  • Der Hund scheint aggressiv zu sein. – The dog seems to be aggressive.

They’re often interchangeable in meaning, but wirken is especially about the impression or effect on you.

How do you pronounce wirkt, especially the ending -rkt?

Pronunciation tips:

• wirkt = [vɪʁkt] (in IPA; exact sound varies by region)
  • wi- like the vi- in "victory", but shorter.
  • -r- is a German r (often a uvular sound in the throat, especially in standard German).
  • -kt is a consonant cluster similar to English "worked".

So wirkt is quite close to English "virkt" (with a German r) and ends like "worked".