PIE nouns, adjectives, and verbs can be divided into two basic groups based on their inflectional patterns: those that had an ablauting short vowel, e or o (in shorthand -e/o-), directly before the inflectional endings (the case-endings in nouns or adjectives, the personal endings in verbs), and those with no such vowel.

I am all done. Hooie!

The huge square box, parquet-floored and high-ceilinged, had been arranged to display a suite of bedroom furniture designed and made in the halcyon days of the last quarter of the nineteenth century, when modish taste was just due to go clean out of fashion for the best part of the next hundred years.

At Birling Gap we can stop and go have a picnic on the beach.