「日本語、がんばってるじゃん！」
= Nihongo, ganbatterujan!
= I see you really working hard on studying Japanese.
How to use っこない ( = kkonai)
「僕に日本語なんて教えられっこないよ。」
= Boku ni nihongo nante oshierarekkonai yo.
= There is no way that I can teach Japanese.
「ハルカ先生どこ？」
= Haruka sensei doko?
= Where’s Haruka-Sensei?
しーっ！
= Shii!
= Shh!
「ここに隠れていたら見つかりっこないからね。」
= Koko ni kakurete itara mitsukarikkonai karane.
= If I hide here, there is no way that they can find me.