Vませんか
A1Meaning: Invite someone to do something together.
Build it: verb ます-stem + ませんか
When to use it: Although negative in form, it is a soft invitation.
いっしょに映画を見ませんか。
Reading help · よみかた
いっしょに えいがを みませんか。
Would you like to see a movie together?
Watch out: Vますか merely asks; Vませんか clearly invites.