なくてはいけない - Grammar Discussion

must do, have to do

Structure

  • Verb[なく・て]・は・いけない

View on Bunpro

2 Likes

The note on this grammar point (and all the other “must do” ones really) says the following:

[いけない = neutral ・ならない = formal/written・だめ = casual/conversational]

But both Japanese Ammo and Tae Kim say that いけない and ならない are the same when it comes to formality, but ならない is more objective (e.g. rules) and いけない is more subjective.

Edit: NihonOnTheGo phrases it quite nicely
The difference between ならない and いけない is that ならない implies a sense of obligation—as in it’s just something that has to be done; like paying taxes, obeying the laws, etc.—It’s inevitable. いけない, however, has a nuance that infers the “inconvenient consequences” of not doing something.

Did i missunderstand this in some way? And if so, what source is the Bunpro note pulled from? (So I can read up on it)

6 Likes

Hey :grin:

I completely agree with those descriptions.

The note will be changed soon.

Sorry for the inconvienience :bowing_man:

2 Likes

So what exactly is the difference between this grammar point and なくちゃ・なきゃ in terms of usage?

5 Likes

@Flyed

Hey and sorry for the late answer :bowing_man:

なくちゃ is a contracted form of なくては and なきゃ is a contraction of なければ, in other words, they are more casual forms.
So when you want to be more casual, or say it faster, you go with those.

It is similar to I’m and I am in English.

5 Likes

My Italki teacher used the construction ないといけない. It seemed to mean the same thing, but I couldn’t find this grammar on Bunpro. Just wanted to mention it here, if it’ll be considered worthwhile to add on its own or at least have a notation about it on similar grammar :slight_smile:

3 Likes

Hey :blush:

It has been on the to-do list :grin:

For the time being, I will add information about it in “must do” grammar points!

Cheers!

3 Likes

Oh awesome! Thanks so much x3

2 Likes

The information about the existence of ないといけない・ならない has been added to the “must” grammar points!
We will try to add the ないといけない and ナイトならない as fast as possible. :+1:

3 Likes

By the way, we have added ないといけない! :bowing_man:

3 Likes