If the subject of sentence is first person then verb must be in what form?

If the subject of a sentence is first person, the verb must be in the first person form.

Here's a breakdown:

* First person refers to the speaker or writer ("I" or "we").

* Verb forms change depending on the person (first, second, third) and the tense (present, past, future).

For example:

* I am going to the store. (First person, present tense)

* We were playing in the park. (First person, past tense)

* I will eat dinner later. (First person, future tense)