ag

In a sentence

• Jag arbetar på skolan.

  I work at the school.

  In this sentence, 'jag' means 'I', the personal subject pronoun used as the subject of the sentence.

• Jag tänker att det är en bra idé.

  I think that it's a good idea.

  Here, 'jag' again acts as the subject pronoun referring to the speaker expressing thought.

• Jag har köpt en ny bok.

  I have purchased a new book.

  This usage of 'jag' illustrates the personal pronoun referring to the action of purchasing a book performed by the speaker.