Does する change to した in certain contexts?

[bright steeple]

I am doing the Anki Core 2k/6k deck and this part had me confused.

[median pond]

した is just the past version of する

[bright steeple]

ohhh

does the same go for なり as the past tense of なる?

[median pond]

する is one of the very few irregular verbs in japanese

[median pond]

No

[pearl oracle]

The Refold Grammar Primer can be found here.

[median pond]

Thanks shiki

Just read the grammar primer it's gonna explain it way better than me

[thick jasper]

I linked the grammar primer. Give it a read. It will go over ways verbs change due to tense.

[bright steeple]

ok