Question

passa para a NEGATIVA:
1) she washed my hair yesterday
2) My mathes made adelicious chocolate cake

passe para a INTERROGATIVA:
1) helen met her friend om monday
2) We had seven lessons on saturday

Answer 1

Para passar a frase para a negativa é necessário usar o "NOT" junto do auxiliar "do" (did no passado) e se for no passado o verbo terá que ir para o presente.
1)She did'n (ou did not) wash (presente) my hair yesterday.
2)My mother did not make a delicious chocolate cake.

Para passar a frase para o interrogativo o auxiliar (did) passará a ser antes do sujeito, e o verbo principal será no presente.
1) Did you meet her friends on Monday?
2) Did you have seven lessons on Saturday?

Answer 2

1)she didn’t wash my hair yesterday
2) my mathes didn’t make a delicious chocolate cake

1)did helen meet her friend on monday?
2) did we have seven lessons on saturday?