Die Lehrerin kritisiert meinen Aufsatz.

my; (masculine or neuter, nominative)

Breakdown of Die Lehrerin kritisiert meinen Aufsatz.

• der Aufsatz: the essay
• die Lehrerin: the teacher (female)
• kritisieren: to criticize

Questions & Answers about Die Lehrerin kritisiert meinen Aufsatz.

Why is it die Lehrerin and not der Lehrer?

Lehrerin is the specifically feminine form of Lehrer (teacher).

• der Lehrer = the (male or unspecified) teacher
• die Lehrerin = the female teacher

In German, many job titles form a feminine version by adding -in:

• der Arzt → die Ärztin (doctor)
• der Student → die Studentin (student)

Because Lehrerin is grammatically feminine, it always takes the article die in the nominative singular: die Lehrerin.

What grammatical role does die Lehrerin have in this sentence?

Die Lehrerin is the subject of the sentence.

• It’s the person performing the action of criticizing.
• As the subject, it is in the nominative case.

So:

• Die Lehrerin (nominative subject)
• kritisiert (verb)
• meinen Aufsatz (accusative object / thing being criticized)

What tense is kritisiert, and does it mean “criticizes” or “is criticizing”?

Kritisiert is the present tense of the verb kritisieren.

German present tense can correspond to both forms in English:

• Die Lehrerin kritisiert meinen Aufsatz.
  = The teacher criticizes my essay.
  = The teacher is criticizing my essay.

German does not have a separate progressive tense (no direct equivalent of “is criticizing”), so the simple present covers both meanings; context decides which English version fits best.