KISS Grammar Workbooks
Nouns Used as Adverbs

Nouns often function as adverbs to answer questions such as: 
"When?" "How long?" "How far?" "How much?" "Where?"

Peter is six months old.
Tuesday, the cat was in the garden.
Peter stopped five feet from her.
The cat looked two feet tall.
It happened a week ago.
Peter ran home.
He was ill five weeks.
The watering can cost five dollars.
The fish are worth twenty dollars.