Editing Grammatical number (section)

===Russian===
{{main|Russian declension#Numerals}}

Modern [[Russian language|Russian]] has a singular vs plural number system, but the [[declension]] of noun phrases containing numeral expressions follows complex rules. For example, {{lang|ru|У меня (есть) одна книга/три книги/пять книг}} ("I have one book-''nom. sing.''/three book-''gen. sing.''/five book-''gen. plur.''"). See [[Dual (grammatical number)#Slavic languages|Dual number: Slavic languages]] for a discussion of number phrases in Russian and other Slavic languages.

The numeral "one" also has a plural form used with [[pluralia tantum]], as in {{lang|ru|одни часы}}, "one clock".<ref>{{cite book |last=Lunt |first=Horace G. |author-link=Horace Lunt |year=1982 |orig-year=1958 |title=Fundamentals of Russian: First Russian Course |location=Columbus, OH |publisher=Slavica |page=204 |isbn=0-89357-097-4 }}</ref> The same form is used with countable nouns in meaning "only": {{lang|ru|Кругом одни идиоты}} "There are only idiots around".