Betty botta bought some butter.изменить по временам

Now Betty botta is buying some butter.
Yesterday this time Betty botta was buying some butter.
Tomorrow at 4 o clock Betty botta will be buying some butter.
Today Betty botta buyes some butter.
Tomorrow Betty botta will buy some butter.
Betty botta has bought some butte,already.
Betty botta had bought some butter by 5 o clock.