помогите пожалуйста! ном 3и ном 4

1. I didn`t go to school,
2. Helen didn't wash the dishes.
3. Alex didn't  play tennis.
4. My mother didn't  write a letter.
5. We didn't  buy flowers.
6. I didn't  eat dinner.
№4
to go/ went/ didn't  go
to buy/ bought/ didnt buy
to study/ studied/ didn't  study
to wash/ washed/ didn't  wash
to eat/ ate/ didn't  eat
to play/ played/ didn't  play
to write/ wrote/ didn't  write