Some of the most common of the nouns that have their singular and plural forms alike are deer, sheep, trout, salmon, brace, yoke, pair, head (of cattle), heathen.

The nouns mile and year must not be confused with this group of words. They have both singular and plural forms. We may say two pair of oxen and five head of cattle, but we must say two miles from here and three years ago, instead of two mile from here and three year ago.

Exercise 204

Use in sentences, first the singular, and then the plural form1 of the nouns studied in Exercise 202.

Write sentences in which you use the plurals of mile and year.

1 Rules for the formation of the plurals of nouns are given In Appendix L.