When the action in a noun clause happens in the future, which tense should I use in the noun clause?
Are the tenses different in meaning if they are all grammatically correct when used in the clause? If yes, shed light on it, thanks a lot!
Here are two examples explaining my questions.
(The son is going to have a adventure to somewhere far away.)
Father talking to the son: Hey, son, when you come back, tell me what you see / saw / will see / will have seen in the journey.
(I am about to go study overseas.)
I talking to mom: Mom, when I come home, I will share with you what I learn / learned / will learn / will have learned overseas.