The friends searched for a whole day, but failed to find the girl in the amusement park.

It seemed unlikely that his friend had failed to mention him.

The rift is serious enough that the friends fail to make up for nearly a month.

If the friend failed to turn up, Pratibha couldn't come to school.

He'd meant no reproof, for he knew why his friends had failed each year.

As days pass by, Bubka and his friends fail to find employment.

The friends then start making a human pyramid, but fail.

Once again, my best friend in all creation fails to invest me with his trust?

It clearly works: a friend at a nearby table fails to recognise him.

A friend of the assailant witnessed the murder but failed to report it.