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Common English Grammar Errors with Plurals
source: Learn English with Rebecca    2015年6月10日
quiz: http://www.engvid.com/common-english-...

How to pronounce words ending in S  

Irregular Plural Nouns
source: JenniferESL   2012-02-23

Plurals and Irregular Plurals
source: dgb111   2008-10-20

Irregular Plural Nouns
source: learnamericanenglish    2008-09-19

Irregular nouns in the plural
source: Crown Academy of English     2013年11月29日

English nouns with only a plural form
source: Crown Academy of English        2017年11月21日

Plurals in English - Beginner English Lesson
source: Oxford Online English        2016年11月25日
See the full version: http://www.oxfordonlineenglish.com/pl...

irregular plural nouns
source: LearnZillion   2012-10-23
resources: http://learnzillion.com/lessons/449
more irregular plural nouns