Hopefully, you have already accomplished the work in forming the plural of nouns from the first practice.  This worksheet shows you more rules for the formation of plurals and irregular forms.

Rule 1: Some nouns are used only in plural form.
          Examples: clothes, scissors, pliers, pants, slacks

Rule 2: Some nouns end in -s, but have a singular meaning.
          Examples: physics, mumps, measles, mathematics, series

Rule 3: Some nouns from other languages are made plural as in the original language.
          Examples: analysis -- analyses; alumnus -- alumni

Rule 4: Compound nouns are usually made plural by adding -s to the most important word in the compound.
          Examples: commanders in chief, brothers-in-law

Rule 5: Compound nouns that are written as one word or that do not have a noun part are made plural by adding -s at the end.
          Examples: cupfuls, forget-me-nots

Rules 6: Letters, numbers, symbols, and words used as "words" are made plural by adding an apostrophe and an -s (words as words means when one is saying something like: "Please watch the number of and's in your paper.")  Words as words follow this rule and are underlined, if italics is not available.