III
2 - the scientist is not tired (tá bem apagada essa última palavra, mas parece ser "tired")
3 - Jill is not a good student
4 - the boxes aren't empty
5 - i am not happy
6 - Julie and i aren't friends
7 - the women are not ready
(todas as frases acima estão no simple present, é possível colocar elas no passado simples também, não sei se é o que a questão quer, todas no passado, não deixa claro, só fala de colocar na negativa, se for pra colocar no passado, onde tem "am" ou "is" trocaria por "was", e onde tem "are" trocaria por "were")
IV
1 - we weren't at work yesterday
2 - was i afraid yesterday?
3 - Carl and Rose were neighbors yesterday
4 - was she absent from class yesterday?
5 - were you late yesterday?
6 - my name wasn't the first one yesterday
