Explanation
Express the idea of 'only', 'no other option but', 'nothing else but'.
Formation
Verb-casual + しかない, い-Adjective + しかない, な-Adjective + しかない, Noun + しかない
Detailed explanation
The ～しかない grammar point is used to emphasize that there are no other options or possibilities, and the subject must follow a specified action or state. It can be translated as 'only', 'no other option but', or 'nothing else but' in English.
Examples
この問題を解決する方法は一つしかない。
Kono mondai wo kaiketsu suru houhou wa hitotsu shika nai.
There is only one way to solve this problem.
彼が出て行ったら、泣くしかない。
Kare ga dete ittara, naku shika nai.
If he leaves, there's nothing else to do but cry.
彼女にはあと一月しかない。
Kanojo ni wa ato ichigatsu shika nai.
She has only one month left.
僕には君を信じるしかない。
Boku ni wa kimi wo shinjiru shika nai.
I have no choice but to trust you.
Practice
Grammar content sourced from hanabira.org.