French Words Ending in -eau: Bureaux or Bureaus?
Compare plural spellings such as bureaux and bureaus.
A2 Grammar
A2 · GRAMMAR
Past tenses and irregular verbs — the heart of A2 grammar.
In this section
Words Ending in -x: Indexes or Indices?
Explore plural forms of words ending in -x, including indexes and indices.
Words Ending in -a: Formulae or Formulas?
Compare everyday and formal plural forms such as formulas and formulae.
Words Ending in -o: Potatoes or Potatos?
Practise plural endings in words such as potatoes, photos and pianos.
Irregular Plurals: Foot → Feet, Goose → Geese
Learn plural forms that change inside the word, such as foot and feet.
Nouns That Do Not Change: One Sheep, Two Sheep
Practise nouns that use the same form for one and for more than one.
Words Ending in -um and -on: Curriculum → Curricula
Explore plural forms such as curricula and phenomena.
Words Ending in -us: Cacti or Cactuses? The Real Answer
Compare plural forms of words ending in -us, including cacti and cactuses.
Words Ending in -is: How to Make the Plural (Analysis → Analyses)
Practise plural forms such as analyses, crises and diagnoses.
Words Ending in -f and -fe: The -ves Plural Rule
Explore how words such as leaf and knife change in the plural.