The noun “mouse” is the singular form of “mice”.

名词mouse是mice的单数形式。

The king (singular), together with two aides, is expected in an hour.

国王（单数） 和两个随从一小时内就到达 。

And Kwaio has not just singular and plural, but dual and paucal too.

瓜依沃语中不光有单数和复数，有双数和若干的概念。

The noun is in the singular.

这个名词是单数形式。