must not do (spoken Japanese) (ちゃいけない・じゃいけない) – Japanese Grammar ちゃいけない・じゃいけない (cha ikenai / ja ikenai)

Q: What JLPT level is ちゃいけない・じゃいけない?

JLPT N5 — Beginner · Basic sentence structures

Q: How do you use ちゃいけない・じゃいけない in a sentence?

Attach ちゃいけない・じゃいけない to the appropriate verb or noun form. Must not do (spoken Japanese)

Q: Is ちゃいけない・じゃいけない formal or casual Japanese?

ちゃいけない・じゃいけない can be used in both casual conversation and polite speech depending on context.

ちゃいけない・じゃいけない

N5 GRAMMAR ⏱ 0s study 📖 0 today

cha ikenai / ja ikenai

must not do (spoken Japanese)

で de 一緒に issho ni のです no desu じゃない・ではない janai / dewa nai 前に mae ni つもり tsumori と to だ・です da / desu にいく ni iku ましょう mashou とき toki なくてもいい naku temo ii があります ga arimasu 方 kata ている te iru も mo が ga はどうですか wa dou desu ka でも demo ないで naide で de 一緒に issho ni のです no desu じゃない・ではない janai / dewa nai 前に mae ni つもり tsumori と to だ・です da / desu にいく ni iku ましょう mashou とき toki なくてもいい naku temo ii があります ga arimasu 方 kata ている te iru も mo が ga はどうですか wa dou desu ka でも demo ないで naide

🃏 Flashcard

ちゃいけない・じゃいけない

cha ikenai / ja ikenai

Tap to reveal usage

must not do (spoken Japanese)

Tap to test your recall · +10 XP

📊 Pattern Stats

JLPT Level N5

Beginner · Basic sentence structures

Reading cha ikenai / ja ikenai

Post ID 50602

Patterns today 0

0 / 10 daily goal

📝 Usage Notes

must not do (spoken Japanese)

🎯 Quick Quiz

What does this grammar pattern mean or do?

ちゃいけない・じゃいけない

📚 How to Master This Pattern

🔊

Say It Aloud

Press Hear it and repeat ちゃいけない・じゃいけない three times. Feel the rhythm — grammar patterns have a natural flow.

🃏

Flip Before Reading

Always try to recall the usage before flipping the card. Struggle = learning. Every failed recall makes the next one stick harder.

✍️

Write Two Sentences

Compose two original sentences using ちゃいけない・じゃいけない. One about yourself, one about something you see right now.

⏰

Spaced Review

Save this pattern and revisit at 10 min, 1 day, 3 days. Production (writing) beats recognition for grammar.

🔗 More JLPT N5 Patterns

だ・です

to be (am, is, are, were, used to)

❓ Frequently Asked Questions

What does the grammar pattern ちゃいけない・じゃいけない mean? ▼

Must not do (spoken Japanese)

What JLPT level is ちゃいけない・じゃいけない? ▼

JLPT N5 — Beginner · Basic sentence structures. To pass JLPT N5 you need to recognise and use this pattern correctly in reading and listening sections.

How do you use ちゃいけない・じゃいけない in a sentence? ▼

Attach ちゃいけない・じゃいけない (cha ikenai / ja ikenai) to the appropriate verb or noun form as described in the usage notes. Then try writing two original sentences — one about yourself and one about something around you.

Is ちゃいけない・じゃいけない formal or casual Japanese? ▼

ちゃいけない・じゃいけない is used in both casual and polite contexts. It appears frequently in everyday conversation, textbooks, and simple written materials.

How can I remember ちゃいけない・じゃいけない long-term? ▼

Use the flashcard on this page for active recall — see the pattern, reconstruct the usage from memory, then flip. Follow with the 4-choice quiz to distinguish it from similar patterns. Review at 10 minutes, 1 day and 3 days (spaced repetition). Writing two original sentences at each review session is the fastest way to reach production-level mastery.