Question

forma interrogativa das frases
you helped your friends.
they morked on a farm.
the boys took their books.
she went to school.
they came by bus.

Answer 1

Did you help your friends ? 
Did they work on a farm ?
did the boys take their books ?
did she go to school ?
did they come by bus ? 

Answer 2

a primeira pergunta esta no passado, então fica:
Did (auxiliar para perguntas no tempo verbal passado) you helped your friends?
todas estao no passado, entao a forma é a mesma .. Did mais a pessoa mais o verbo e o resto...