The plural 's' is not a free form, as it must always be attached to a noun.

表示复数的s不是自由语素，必须附着于名词。

《牛津词典》

Thus for example, every noun ends in "o", every adjective in "a", and basic form of every verb in "i".

例如，每个名词以“ o ”结尾，每个形容词以“ a ”结尾，每个动词的基本形式以“ i ”结尾。

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However, as Amy Edmondson of Harvard points out, organizations increasingly use "team" as a verb rather than a noun: they form teams for specific purposes and then quickly disband them.

然而，正如哈佛大学的艾米·埃德蒙森所指出的那样，越来越多的组织将“团队”用作动词而非名词，原因是他们往往为了一些特殊目的组建团队，之后迅速地又解散团队。

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