It depends on the verbs in brackets. you want them present or past tense? let me know to help you!
to identify and eliminate habitual errors
Both Derek and I will go to the dance etc...
Remove the other character and try to write the sentence as if it was just yourself doing the action: "Myself will go" or "Me will go" don't sound right, but "I will go" is correct.
Wherever is the subordinating conjunction.
Hey. I think I um did something useful. I FOUND A MISSING CHILD AND I SAVED THEM.
But if you’re looking for some formal for like school:
For, friend
Hi, I ran into a kid and realized he was a missing child I had seen on tv some time ago. I took him to the police immediately and they found their parents! -Sincerely (you)