"erstwhile friend"
"our former glory"
"the once capital of the state"
"her quondam lover"
"at one time he loved her"
"her erstwhile writing"
"she was a dancer once"
His hair was frizzed and much lighter than erstwhile.
出自: W. Golding
The conservative will find the practice of politics as difficult as he has erstwhile found its theory.
出自: R. Scruton