Respostas
Resposta:
1 - The children were crying 5 minutes ago;
2 - The boys were not doing their Japanese lesson;
3 - Roy was wearing his brown shirt;
4 - We were reading the newspaper one hour ago;
5 - Was Jane preparing dinner?;
6 - I was not studying geography;
7 - That man was building a doghouse;
8 - They were not traveling around the country last week;
9 - I was wearing my old skirt at the party;
10 - Was your brother sleeping on the sofa?;
11 - Jack and Ann were having breakfast;
12 - My brother was waiting for you;
13 - Those girls were looking for you;
14 - Was Lucy singing in the garden?;
15 - The old man was not swimming in the lake;
16 - Father was sleeping in the garage;
17 - Were the children watching TV in their bedroom?
Explicação:
No Past Continuous, a estrutura das frases seria:
Afirmativa: Sujeito + verbo auxiliar (to be) no passado + verbo principal com o sufixo -ing + complemento;
Negativa: Sujeito + verbo auxiliar (to be) no passado + not + verbo principal com o sufixo -ing + complemento;
Interrogativa: Verbo auxiliar (to be) no passado + Sujeito + verbo principal com o sufixo -ing + complemento.
No caso, o verbo auxiliar (to be) será transformado em was em situações onde o sujeito for algum dos seguintes pronomes: I, he, she ou it. Já em casos onde o pronome usado é you, they ou we, o verbo auxiliar seria transformado em were.
A partir disso, é só realizar as substituições dos sujeitos e analisar qual dos pronomes se encaixaria melhor.
Ex: "The children", na primeira frase, poderia ser traduzido como "as crianças"; logo, o pronome a ser utilizado seria they ("elas"/"eles"). A frase é afirmativa, então sua estrutura seria:
Sujeito ("The children") +
verbo auxiliar (to be) no passado ("were") +
verbo principal com o sufixo -ing (nesse caso, "crying") +
complemento ("5 minutes ago").
Espero ter ajudado!