N2Judgment & Opinion

V-dictionary / V-nai + わけにはいかない

Q: Is "Confusing with ～できない (simple lack of ability)" correct?

No. The correct form is "Use ～できない when expressing a simple lack of ability.". ～わけにはいかない is used to express a sense of obligation or duty, while ～できない is used to express a simple lack of ability.

Q: Is "Confusing with ～ざるを得ない (forced by external circumstances)" correct?

No. The correct form is "Use ～ざるを得ない when expressing a forced action by external circumstances.". ～わけにはいかない is used to express a sense of obligation or duty, while ～ざるを得ない is used to express a forced action by external circumstances.

Q: Is "Double negative confusion (nai wake ni wa ikanai = must do)" correct?

No. The correct form is "Use nai wake ni wa ikanai when expressing a sense of obligation or duty, not when expressing a forced action.". nai wake ni wa ikanai is a double negative expression that means 'I don't dare to do something', not 'I must do something'.

Cannot (for social, moral, or situational reasons)

Definition

Meaning

The grammar pattern "V-dictionary / V-nai + わけにはいかない" is used to express that the speaker wants to do or not do something but is prevented by social expectations, common sense, or a sense of duty. This pattern is often used in situations where the speaker feels obligated to act in a certain way due to social norms or expectations. It is not used to express a simple lack of ability or a forced action by external circumstances.

Structure

Formation Rules

Form	Pattern	Example
dictionary form	V-dictionary + わけにはいかない	食べるわけにはいかない (I don't dare to eat)
nai form	V-nai + わけにはいかない	休むわけにはいかない (I don't dare to take a break)
te form	V-te + わけにはいかない	行くわけにはいかない (I don't dare to go)

Examples

Example Sentences

明日は大事な会議があるから、休むわけにはいかない。

Ashita wa daiji na kaigi ga aru kara, yasumu wake ni wa ikanai.

I don't dare to take a break tomorrow because there's an important meeting.

明日は大事な会議があるから (tomorrow is an important meeting because) + 休むわけにはいかない (I don't dare to take a break)

お世話になった先生の頼みなら、断るわけにはいかない。

Osewa ni natta sensei no tanomi nara, katsu wake ni wa ikanai.

I don't dare to refuse a request from a teacher who has helped me.

お世話になった先生の頼みなら (a request from a teacher who has helped me) + 断るわけにはいかない (I don't dare to refuse)

試験まであと一週間だから、遊んでばかりいるわけにはいかない。

Shiken made ato ichi shūkan kara, asonde bakari iru wake ni wa ikanai.

I don't dare to play all the time because there's only one week left until the exam.

試験まであと一週間だから (there's only one week left until the exam because) + 遊んでばかりいるわけにはいかない (I don't dare to play all the time)

Context

Usage Notes

This pattern is used in formal and informal situations to express a sense of obligation or duty. It is often used in situations where the speaker feels pressured by social norms or expectations. It is not used to express a simple lack of ability or a forced action by external circumstances.

Watch out

Common Mistakes

Confusing with ～できない (simple lack of ability)

Use ～できない when expressing a simple lack of ability.

～わけにはいかない is used to express a sense of obligation or duty, while ～できない is used to express a simple lack of ability.

Confusing with ～ざるを得ない (forced by external circumstances)

Use ～ざるを得ない when expressing a forced action by external circumstances.

～わけにはいかない is used to express a sense of obligation or duty, while ～ざるを得ない is used to express a forced action by external circumstances.

Double negative confusion (nai wake ni wa ikanai = must do)

Use nai wake ni wa ikanai when expressing a sense of obligation or duty, not when expressing a forced action.

nai wake ni wa ikanai is a double negative expression that means 'I don't dare to do something', not 'I must do something'.

Strategy

JLPT Exam Tips

When using this pattern in the JLPT exam, make sure to use the correct form of the verb (dictionary, nai, or te) and the correct expression of obligation or duty. Also, be careful not to confuse this pattern with ～できない or ～ざるを得ない.

In context