行かなくてもいい

don't have to go

→ 行く
phrase Rare #28,225
don't have to go Means that going is not necessary or required. Literally, it means that it is okay even if someone does not go.
JA: 明日は学校に行かなくてもいい。
EN: You don't have to go to school tomorrow.

行かなくてもいいって言われたんだ

I was told I didn't have to go.

彼は翌日学校へ行かなくてもいいように病気のふりをした

He pretended to be sick so he wouldn’t have to go to school the next day.

行かなくてもいい理由があればいいのに

I wish I had a reason not to go.

コストコ今回は行かなくてもいい

Is it okay if we skip Costco this time?

明日台風なら仕事に行かなくてもいいってことかしら

I wonder if that means I don't have to go to work tomorrow if there's a typhoon?

彼は今日は学校へ行かなくてもいい

He doesn't have to go to school today.

トム今日は仕事に行かなくてもいい

Tom doesn't have to go to work today.