Particles · N4
だけ vs しか〜ない: two kinds of “only”
Both limit a set, but しか requires a negative predicate and often feels more restrictive.
In short
だけ simply marks the limit: 水だけ飲みます, “I drink only water.” しか combines with a negative form: 水しか飲みません, literally “I do not drink anything except water.”
How it works
The factual range may be identical, but しか〜ない often foregrounds the smallness or restriction more strongly.
Useful contrast
しか is grammatically tied to a negative predicate even when the natural English translation is positive “only”.
Examples
千円だけあります。
I have exactly/only 1,000 yen.
千円しかありません。
I have only 1,000 yen.
Common pitfall
Do not write *水しか飲みます. Pair しか with a negative form such as 飲みません.