i

In a sentence

• Ich bin ein Student.

  I am a student.

  In this sentence, 'ich' is used as the first-person singular pronoun equivalent to 'I' in English, signifying the speaker.

• Mir gefällt die Musik.

  I like the music.

  Here 'mir' is the dative form of 'ich,' used to express whom the liking is directed towards, functioning as 'to me' in English.

• Mein Freund und ich gehen ins Kino.

  My friend and I are going to the cinema.

  In this structure, 'ich' functions as part of a conjunction to establish subject compound.