vocabulary words: live, alive, life

I don’t understand very well the difference between the follow words:

live-live-alive-life, and the past tense of these words.

live-live-alive-life and the past tense of these words.

Live, as verb, has all the usual present, past and present and past participle forms. live, lives, living, lived,(ed) lived(en)
I live,
he lives.
They lived here last summer.
Living is difficult these days.
He has lived a pleasant life…

It is a live wire. As adjective brfore the noun.

This man is alive. A completing adjective.

The noun form of ‘Live’ (v)