~なきゃいけない
〜nakya ikenai
JLPT N4 Casual
Formation
Verb-casual (negative form without い) + なきゃいけない
Express a necessity or obligation; 'must', 'have to'.
When to use
Casual contraction (なければ -> なきゃ); the most common everyday spoken form.
Explanation
The ~なきゃいけない grammar point is used to express a sense of necessity or obligation, similar to saying 'must' or 'have to' in English. It is a casual and more colloquial form of the ~なければいけない grammar point. The formation is different for verbs, but it is not used with い-adjectives, な-adjectives, or nouns.
Example sentences
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I have to finish my homework by tomorrow.
Ashita made ni shukudai wo owaranakya ikenai.
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We're leaving soon, so I have to hurry and get ready.
Mou sugu dekakeru kara, isoide junbi shinakya ikenai.
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I must submit this project by next week.
Kono purojekuto wa raishuu teishutsu shinakya ikenai.
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I have to buy a ticket before getting on the train.
Densha ni noru mae ni, kippu wo kawanakya ikenai.
Obligation (Must / Have to)
- ~ないといけない〜nai to ikenaiN4Express a necessity; 'must', 'have to', 'need to'.
- ~なくてはいけない〜nakute wa ikenaiN4Expresses the necessity or obligation; 'must', 'have to'.
- ~なければ ならない〜nakereba naranaiN4Express obligation or necessity; 'must', 'have to', 'need…
- ~ねばならない〜neba naranaiN2Expresses obligation or necessity; 'must', 'have to'…
- ~ないと〜nai toN3Express a condition; 'if... not', 'unless', 'must'.
Corpus examples (60)
もー、お客さんが来るってだけで、ズボン履かなきゃいけないの?
So just because we're having guests over I'm supposed to wear pants?
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I need to buy food, but I don't have enough money.
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You must repay your debts.
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You've got to go even if you don't want to.
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You have to go whether you like it or not.
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I may have to study French.
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Today I have to study French.
おばあちゃんのレシピに従っているのは分かるけど、もっと安い材料を探さなきゃいけないよ。
You'll need to find cheaper, alternative ingredients even though you're basing your recipe on your grandmother's.
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I need to finish this work before it gets dark.
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I told Tom he should study harder.
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I have to go to Boston with Tom.
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Where's the nearest pharmacy? I need to buy some medicine.
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I have to take two pills every six hours.
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Tom has to take medicine every three hours.
ラマダン中って、ムスリムさんは日中に食べること、飲むこと、性行為を控えなきゃいけないのよ。
In Ramadan, Muslims need to abstain from eating, drinking, and having sex during the day.
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Why would Tom lie?
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He needs to speak English.
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I have to give a speech in English class.
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I have to hurry to the station to catch the last train.
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Is there anything else I need to do?
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How many times do you have to go to the dentist?
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I need to be home on Monday.
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It's already time to go home.
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We need to sell our house.
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I need to go home and feed my dog.