Need help over here.

0 1. When to use "had" ? Since it serves as a past tense but I don't see it being used when it should like ... "I have played football yesterday" which is a sentence in past tense form but why have instead of had ?02br
02br
002. We must make the word after "never" past tense ? Eg. I never do that before/I never did that before ? Eg. I pretend like she never left me/I pretend like she never leaves me ? 0-