I am是动词to be现在时的第一人称单数。

'I am' is the first person singular of the present tense of the verb 'to be'.

《牛津词典》

注意一下这里动词的形式：我故意用了一般现在时。

Mind the form of the verb there: it is present tense intentionally.

youdao

西班牙语的动词现在时有六种形态，过去时、未完成时、将来时、条件句、虚拟句以及另外两种过去时虚拟式也各自有六种形态，加起来一共是48种。

A Spanish verb has six present-tense forms, and six each in the preterite, imperfect, future, conditional, subjunctive and two different past subjunctives, for a total of 48 forms.

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