Grade 3 Fall — Personal Narrative, Complex Sentences with Subordinate Clauses, and Morphology with Affixes and Roots
English · GR G3 eng.g3.f.gr.regular_irregular_plurals_expanded

Form and use regular and irregular plural nouns (L.3.1.b)

Form regular plurals (-s, -es, -ies after consonant+y) and 16 high-frequency irregular plurals (children, women, men, feet, teeth, mice, geese, people, fish, sheep, deer, leaves, lives, loaves, halves, knives, wolves). Notice three irregular patterns: same-form (sheep/fish/deer), vowel-change (foot/feet, tooth/teeth, goose/geese, mouse/mice), and -f→-ves (leaf/leaves, wolf/wolves).

Mastery threshold
90%
Min instances
12
Typical minutes
30
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Prereqs
Successors
  • eng.g4.f.gr.plurals_advanced_octopi_cacti
    (not yet loaded)
Common misconceptions
  • Pluralizes 'children' as 'childrens' (adds -s to an already-irregular form).
  • Pluralizes 'leaf' as 'leafs' (skips the -f→-ves rule).

Exercise pool (2)

Diff Stem Type
2 Sort these 16 irregular plurals into 3 pattern columns: SAME-FORM, VOWEL-CHANGE, -F TO -VES. Forms: feet, mice, leaves, sheep, lives,... irregular plural pattern sort
3 Write the plural of each underlined noun and complete the sentence. (1) One leaf fell. Now many ___ are on the ground. (2) One mouse... plural in sentence