Threes

Guests arrived by twos and threes.

Some go in groups organized by their schools, but most go in twos and threes.

These things always happen in threes.

After 11 o'clock the guests began to leave by twos and threes.

Birds came flying by twos and threes.

They will lodge by twos and threes in lonely farmhouses.

They lodged by twos and threes in the cottage.

Misfortunes always come in threes.

All good things come in threes.

Buses always come in threes.