It is not rare at all to live over ninety years.
Complete agreement between theory and practice is a rare case.
We must register for the courses that we're going to take by tomorrow.
She is a woman of singular beauty.
Such beauty as hers is rare.
She seldom, if ever, goes to movies by herself.
They seldom, if ever, speak in French.
He is as great a statesman as any.
He was as great a poet as ever lived.
He is the greatest poet that ever lived.
He is as great an artist as lived.
He is as great a scientist as ever lived.
He is as great a statesman as ever lived.
He is the greatest architect that has ever lived.
He is as diligent a man as ever lived.
Patience is a rare virtue these days.
An eclipse of the sun is a rare appearance.
She seldom, if ever, goes out after dark.
She seldom, if ever, goes out after dark.
She seldom, if ever, goes out after dark.