Respostas
1)- I helped my mother.
- We watched the film.
- They walked in the park.
- Bob played basketball.
2)- You saw my friends.
- He spoke about holidays.
- Peter had a short breakfast.
- Susan made a nice present.
3)- She saw a good film.
- We ate well.
- Regina and Peter wrote a new book.
- They saw "Titanic" three times. (Na verdade o verbo dessa frase está errado. O certo seria "watched".)
- The boy washed the car.
- Mr. Smith did a lot of exercises.
- He lost his glasses several times.
- I tried to stop smoking many times.
4)- Telma walked to work last night.
- They arrived late for the party.
- It ended at 6 p.m.
- Did Bob and Roger use my new pen?
- Antony remembered everything.
- He didn't study computers for five years.
- Did we marry in a church?
- Did Ellen wait for an hour?
- You didn't like the movie.
- The teacher didn't help the students.
OBS: Nas frases negativas usa-se o verbo auxiliar do em sua forma negativa e no passado ( did + not = didn't ), por isso não é necessário conjugar o verbo principal da frase.
Já nas frases interrogativas é quase a mesma coisa: o verbo auxiliar do já é conjugado, portanto, não precisa mudar a forma do verbo principal.