しまう

  1. C

    Question about usage of しまう

    Right now I'm working through Nihongo-Sou-Matome for JLPT N3. I recently came across an example sentence that I'm a little confused by. The sentence is: 試験が終わった!今日は飲んじゃおう! I get that this means: The test is done! Let's drink today! What I'm confused about is that I thought that しまうwas only used...
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