All singular or plural grammar girl

All is well. If you can replace “all” with “they,” then it is plural

2024-03-29
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  1. For example, “that is all” works because “that” is singular
  2. “Girls” becomes “girls'” in both plural forms
  3. Each of these is valid
  4. An alumna is one female graduate
  5. “Type of” refers to a singular instance or type
  6. The category they give is "countable + singular or plural verb"
  7. 11
  8. child - children
  9. “I know three girls”)
  10. The word girl’s is the singular possessive form of girl
  11. The girls each have written e-mails