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4週5日目 せざるをえない
Perspective・object・obligation
4週5日目

〜ないわけにはいかない

接続:Vない+わけにはいかない
Can't help but do it because of responsibility
注意 / Note:ざるを得ない is forced due to circumstances; ないわけにはいかない due to responsibility; しかない means there is no other option.
比較 / Compare:Same article: 〜ざるを得ない/〜しかない. These models are often mistakenly chosen for each other — carefully read the 接続 and nuances above and then decide.
よく出る形 / Common form:動ない形+わけにはいかない。The reason is OBLIGATION or common sense in society, other than 〜ざるを得ない (forced circumstances).
約束したので、行かないわけにはいかない。
I made a promise so I couldn't not go.
頼まれたら、手伝わないわけにはいかない。
If asked, I can't help but help.
私が言い出したことだから、途中でやめるわけにはいかない。
I was the one who proposed it so I couldn't give up halfway.

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