NihongoShark

JLPT N4: ～なければいけない

Quick! Go review this lesson: JLPT N4: ～なければならない.

Then you can relax, since the lesson you're reading now essentially covers the same thing: Saying "must" or "have to."

The differences:

1) Instead of ～なければならない／～なければなりません, we're saying ～なければいけない／なければいけません.

So, ならない → いけない.

2) While the meaning is pretty much the same (="must"), you'll find that it's especially common to use ～なければならない when talking about things that social norms demand one "must" do (a distinction of which I was unaware until I started writing this lesson).

3) ～なくてはならない and ～なくてはいけない basically mean the same thing as ～なければいけない. We'll talk about these other forms in an upcoming lesson.

Agh, all these kana combos! My head is spinning.

Let's look at an example:

もらった物は、大事にしなければいけない。

もらった　もの　は、　だいじ　に　しなければいけない。

You must take (good) care of things you’ve received (as gifts).

“received + thing + は, + must value / must take care of (=important/valuable + に + must do).”

👷 Construction 👷

Weren't you paying attention in our last lesson?!

A refresher:

If you don't remember your ば-conditional conjugations, you should review this lesson: JLPT N4: ～ば.

You will see ～なければいけない being used with VERBS, i-adjectives, and na-adjectives and NOUNS in the following ways:

V なければいけない
i-adjective く＋ なければいけない
na-adjective / NOUN ＋で＋ なければいけない

Also, remember that ～なければ can morph into ～なきゃ, and the いけない part can be dropped.

Both of these changes are more common in spoken language.

Now, I think it's high time we drowned ourselves in example sentences...

パスワードは８字以上でなければいけません。また、誕生日や電話番号は使わないでください。

パスワード　は　はちじ　いじょうでなければいけません。　また、　たんじょうび　や　でんわばんごう　は　つかわないで　ください。

Your password must be at least eight characters. Also, please do not use things like birthdays, phone numbers, and so on.

“password + は + eight characters + at least / not less than + must be. + also, + birthday + や + phone number + は + don’t use (and) + please.”

ノートパソコンは軽くなきゃいけないよね。

ノートパソコン　は　かるくなきゃいけない　よ　ね。

Laptops need to be light, don’t you think?

“laptop (=notebook PC) + は + must be light (i.e. not heavy) + よ + ね.”

子供を迎えに行かなきゃいけないので、お先に失礼します。

こども　を　むかえ　に　いかなきゃいけない　ので、　おさき　に　しつれい　します。

I need to go pick up my kid(s), so I’ll be going now.

“children + を + must go to meet / must go pick up + because (=ので), + excuse me for leaving before you (=beforehand + に + discourtesy / impoliteness + do).”