Verified answer

Resposta:

1) A: They don't going to school on foot.

B: They don't have gone to school on foot.

C They didn't go to school on foot

D: They weren't going to school on foot

2) A: Jenny is writing a letter to his parents

B: Jenny has written a letter to his parents

C: Jenny did write a letter to his parents

D: Jenny was writing a letter to his parents

Explicação:

Present Continuous = ING

Present Perfect = has/have + verbo no past parciple

Simple Past = Did + verbo (não muda o verbo por conta do DID)

Past Progessive = was/were + verbo com ing.

Espero ter ajudado, :)