名词的单复数也很难。

Plurals were hard, too.

youdao

英语双关就利用了英语的缩略语与名词的单复数形式来创造双关，而汉语则有其独特的歇后语双关。

In English pun can be made on abbreviation and the singular and plural forms of English words, which cannot be used in Chinese pun, while the allegorical pun is unique to Chinese.

youdao

琼斯先生：名词没有单复数形式的区别。

Mr Jones: And there isn't a different form for plural nouns.

youdao

Also, current singular versus plural with nouns and verbs.

然后是名词和一般现在时动词的单复数。

韩国人经常犯的失误 - SpeakingMax英语口语达人