Поставьте предложения в Present Perfect Simple.
Первые 3 в отрицательное , а вторые 3 в выпросительное
а)
1)We have already bought this dictionary.
2)He has already had lunch.
3)They have already seen this documentary.
b)
1)We have already done shopping
2)He has already finished his work
3)The cat has already drunk thge milk