Series既是单数形式又是复数形式。

Series is both a singular and a plural form.

youdao

的单数形式是怎样的？

What is the singular of 'children'?

youdao

它有一个长鼻子和一个短尾巴。 用第三人称单数形式。

It (has )a long nose and a short tail.

youdao

（注意谓语用第三人称单数形式）许多工人经常关心我们。

Many a worker often shows concern for us.

youdao

（注意谓语用第三人称单数形式）许多工人经常关心我们。

Many a worker often shows concern for us.

youdao