V(ない type)　＋　と　question

maxchu said:

As title, what do sentences like that mean? For ex:

ぜひ 見ないと ....

もう 帰らないと....

Thanks in advance.

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Buntaro said:

They mean: If you/I do not ... then ... will happen.

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JimmySeal said:

If those are used as sentences on their own, then they mean.
By all means [X] must see [it].
I must go back.

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undrentide said:

Actually there's hidden いけない after these ～ないと.
ぜひ見ないと（いけない）
もう帰らないと（いけない）
～ないといけない is similar to ～なくてはいけない/～なくてはならない, meaning must/have to ~ (as Jimmy Seal san translated.)

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MrWabu said:

If I remember correctly...

～なければなりません（なければならない） is something you must do, that is enforced by some outside rule.
For example:
「今晩宿題をしなければならない」
「ご飯を食べた後薬を飲まなければならない」

～なくてはいけない is something you must do, but only enforced by yourself. I believe this is the more commonly used of the two.
For example:
「もう遅い。帰らなくてはいけない」
（映画館を出るとき）「この映画もう一度見なくてはい けない！」

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MrWabu said:

If I remember correctly...
～なければなりません（なければならない） is something you must do, that is enforced by some outside rule.
For example:
「今晩宿題をしなければならない」
「ご飯を食べた後薬を飲まなければならない」
～なくてはいけない is something you must do, but only enforced by yourself. I believe this is the more commonly used of the two.
For example:
「もう遅い。帰らなくてはいけない」
（映画館を出るとき）「この映画もう一度見なくてはいけない！」

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Elizabeth said:

Really ? I'd see まなければならない much more frequently in general conversation I suppose since なくてはいけない is way the more polite (and colder) of the two. And I don't think it is a matter of enforcement although there are some differences in usage that I know sort of instinctively but can't explain well.

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