てしまう could be an inflection of て, with these forms:
- Te-form. It is a connective form of the verb.
More reading
- Tae Kim's Guide to Learning Japanese: Things that happen unintentionally (~てしまう、~ちゃう/~じゃう)
- IMABI: ~てしまう
Sentences — 250 found
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jreibun/5211/2
- ひと人 は、どんなに
- いっしょうけんめい一生懸命 頑張っても正当に評価されないと、生きる
- きりょく気力 を失ってしまうものである。
People lose the will to live when their efforts are not fairly evaluated no matter how hard they try. — Jreibun