particle N2 common casualpolitewritten

〜だけは — do at least ~

〜だけは・だけは

Builds on 〜だけ

Meaning

~ at least / ~ if nothing else — singles out one thing as assured or non-negotiable while leaving the rest aside

挨拶あいさつだけはちゃんとしなさい。

At the very least, greet people properly.

Attaches to	Form	Example
Verb (plain) / Noun	V(plain) + だけは; N + だけは	やるだけは / 約束やくそくだけは

成績せいせきは悪わるいが、出席しゅっせきだけはしている。

My grades are bad, but I do at least show up.

あの人ひとの言いうことだけは信しんじられない。

Of all things, it's what that person says that I can't trust.

できるだけはやってみた。

I did at least as much as I could.

Strongly contrastive: it marks one item as standing apart from everything around it — either the one thing you guarantee (これだけはやる) or the one exception you single out (それだけは別べつだ).

Jengo shows 〜だけは the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.

Sources Editorial confidence: medium.