Grammar: Buy

Nan has bought milk eggs and bread more than once a week since she started living on her own. Well, she usually has.

She's bought bread and milk quite often but she hasn't bought eggs quite so often since she's always bought a dozen eggs at a time. Her real problem has been vegetables.

She can't buy them in small amounts, so she has always bought more than she actually needed and they often spoil. Then she has always bought more.