Сопоставьте активные формы с пассивными в тех же временах.

I’m buying a gift - a gift is being bought

I was buying a gift - a gift was being bought

I bought a gift - a gift was bought

I had bought a gift - a gift had been bought

I will buy a gift - a gift will be bought

I’ve bought a gift - a gift has been bought

I buy a gift - a gift is bought

Объяснение: