Даны 3 отрицательных предложения в Present Simple: 1) My friend don't seen this movie. 2) Sasha don't writes this message. 3) Masha don't listen to teachers. Какие ошибки в этих предложениях?

1) My friend don't seen this movie. - My friend doesn't see this movie. - My friend - третье лицо единственное число (does + not + infinitive).

2) Sasha don't writes this message. - Sasha doesn't write this message. - Sasha - третье лицо единственное число (does + not + infinitive).

3) Masha don't listen to teachers. - Masha doesn't listen to teacher. - Masha - третье лицо единственное число (does + not + infinitive).