[verb て-form] + もしかたがない
[i-adj 〜い → 〜くて] + もしかたがない
[na-adj] + でもしかたがない
Variants: しかたがない may also appear as 仕方がない / 仕方ない; しょうがない may appear as しようがない
The grammar patterns てもしょうがない and てもしかたがない express that doing something is pointless, futile, or that a situation cannot be helped. They convey the idea that even if an action is taken or a feeling exists, it won't change anything – so there's no use dwelling on it.
しかたがない (仕方がない) literally means "there is no way/method," and しょうがない is its colloquial contraction. Both are interchangeable in meaning, but **しょうがない** is more casual and common in everyday speech, while **しかたがない** is slightly more formal.Used with the て-form of verbs to say "there's no point in doing ~" or "it's no use doing ~."
This usage often carries the nuance of advising someone (or oneself) to stop doing something unproductive and move on.
Used with adjectives or verbs to describe an unavoidable feeling or situation – something beyond one's control that one must simply accept.
In polite speech, しょうがありません and しかたがありません are used.