Don't you think you're going to fail the next exam?
Aren't you going to fail the next test?
"次の試験は落ちるんじゃない？" は英語で
- Won't you fail the next test?
- Don't you think you're going to fail the next exam?
- Aren't you going to fail the next test?
といえます。
例文：
次の試験は落ちるんじゃない？勉強しないでだらけているから。
- Won't you fail the next test? Since you're just slacking off and not studying.
- Don't you think you're going to fail the next exam since you're just procrastinating?
「次の試験は落ちるんじゃない？」と冗談で言う場合、"fail"（落ちる、失敗する）を使うのが自然です。冗談っぽく軽いトーンで伝えるなら **"You might fail the next exam!"** や **"You'll probably fail the next test!"** が適しています。
- **"You might fail the next exam!"** は「次の試験、落ちるかもよ！」と、少し優しいニュアンスです。
- **"You'll probably fail the next test!"** は「次のテスト、多分落ちるよ！」と、よりふざけた軽口になります。
アメリカ合衆国 
