お風呂（ふろ）に一緒（いっしょ）に入（はい）りませんか。

暇（ひま）だから、一緒（いっしょ）に遊（あそ）びませんか。

一緒（いっしょ）に帰（かえ）りませんか。

寿司（すし）を食（た）べに行（い）きませんか。

一緒（いっしょ）に文法（ぶんぽう）を勉強（べんきょう）しませんか。

金曜日（きんようび）に、買（か）い物（もの）に行（い）きませんか。

カラオケで、歌（うた）いませんか。

サッカーをしませんか。

一緒（いっしょ）に洗（あら）い物（もの）しませんか。

映画（えいが）を見（み）に行（い）きませんか。

あのプールに泳（およ）ぎに行（い）きませんか。

明日（あした）、一緒（いっしょ）に学校（がっこう）に行（い）きませんか。

<div class='writeup-body'>ませんか (or ないか more casually) is an expression that is used after verbs as an invitation. It basically translates to 'won't you do (A) with me?'. This expression is a little bit different to ましょうか, in that it sounds directly like an invitation to do (A). ましょうか tends to sound more like a suggestion that (A) should be done.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>明日（あした）は温泉（おんせん）に行（い）きませんか。</div><div class='writeup-example--english'>Won't you go to the onsen with me tomorrow? (Polite)</div></li> <li class='writeup-example'><div class='writeup-example--japanese'>来週（らいしゅう）は釣（つ）りをしに行（い）かないか。</div><div class='writeup-example--english'>Won't you go fishing with me next week? (Casual)</div></li></ul>It is recommended to use the ませんか version, as ないか would be a bit too casual to use with someone that you are not very close with (and is also technically not correct Japanese). To make it clearer that the speaker wants to do (A) 'with' someone, expressions like 一緒（いっしょ）に 'together' are often added, for clarification.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>一緒（いっしょ）にお祭（まつ）りへ行（い）きませんか。</div><div class='writeup-example--english'>Won't you go to the festival with me?</div></li></ul>To examine the difference between ましょうか and ませんか, let's have a look at how the nuance changes in the same type of sentence.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>ラーメンを食（た）べに行（い）きましょうか。</div><div class='writeup-example--english'>Shall we go eat ramen?</div></li><li class='writeup-example'><div class='writeup-example--japanese'>ラーメンを食べに行（い）きませんか。</div><div class='writeup-example--english'>Won't you go eat ramen with me?</div></li></ul>Here, ませんか will come across as an invitation due to the fact that you are asking the person if they 'wouldn't mind doing (A)' with you. This is the main reason that it is considered a more polite option when inviting someone to do something, than ましょうか.</div>

Grammar Info

ませんか

Won't you, Would you not, Why don't we