てしかたがない (te shikata ga nai): Feeling something extremely strongly
～てしかたがない (te shikata ga nai)
Meaning
Extremely; cannot help feeling
Formation and usage
Te-form verb, i-adjective with い replaced by くて, or na-adjective + で + しかたがない.
Explanation
Emphasize an emotion, sensation, or desire that is very strong and hard to control. It usually describes the speaker's experience; another person's feelings need suitable context or evidence. This differs from standalone shikata ga nai meaning that nothing can be done.
Examples
試験の結果が心配でしかたがありません。
I cannot help worrying about the exam results.
今日は眠くてしかたがありません。
I am terribly sleepy today.
久しぶりに家族に会えるので、うれしくてしかたがありません。
I am extremely happy because I will finally see my family again.
あの店のケーキが食べたくてしかたがありません。
I am really craving the cake from that shop.
一人で暮らし始めたころは、寂しくてしかたがありませんでした。
When I first started living alone, I felt terribly lonely.
How related patterns differ
てしかたがない and てしようがない emphasize a strong, hard-to-control feeling. てたまらない suggests an unbearable sensation or intense desire. てならない often describes a feeling or thought arising naturally; do not confuse it with prohibitive てはならない.