Réponse:
Was i gardening yesterday afternoon ?
No, i was not ( ou wasn't) gardening yesterday afternoon.)
Were you singing when i arrived ?
No, you were not (ou weren' t)singing when i arrived.
Was Gloria sweating before she died ?
No, Gloria was not (ou wasn't) sweating before she died.
Was Lans following Gloria a few minutes before her death ?
No, Lans was not ( ou wasn't) following Gloria a few minutes before her death.
Explications:
pour la forme interrogative il suffit de placer l'auxiliaire dans ce cas Be conjugué comme dans tes phrases avant le sujet.
pour la forme négative il faut mettre not après Be. Je t'ai mis la forme contractée entre parenthèses tu peux la mettre si tu veux c'est tout aussi juste.
voilà j'espère avoir été assez clair.
Bonne journée