How do i ask my mom....?

how do i ask my mom if i can go see diary of a wimpy kid with 3 of my friends. cuz b4 i asked her if i cud, just 2 see wat she wud say an she sayd yes but i wanna go in 11 days(wat day is that) so how do i ask nicely and convince my friends moms to let them go.tttttttthhhhhhhhhhhhhaaaaaaaaaaaaannn…