I was surprised to find out that you should write:
I waited for a torturous three days.
Instead of:
I waited for torturous three days.
Why is this? "Days" is plural …
singular-vs-pluralword-orderword-usage
I was surprised to find out that you should write:
I waited for a torturous three days.
Instead of:
I waited for torturous three days.
Why is this? "Days" is plural …
Best Answer
In phrases that follow this pattern:
a {modifier} {number} {plural noun relating to time}
{plural noun} is understood to be a duration.