You use this to say something is impossible. You are sure it is not true. You ask a question to agree with others.
Verb [dictionary form] + わけないでしょ？Primary
い-Adjective + わけないでしょ？
な-Adjective + な + わけないでしょ？
Noun + の + わけないでしょ？
You use this to say something is impossible. You are sure it is not true. You ask a question to agree with others.
あの人が正直に謝るわけないでしょ？いつも言い訳ばかりなんだから。
There's no way that person would apologize honestly, right? They always just make excuses.
昨日徹夜したのに、彼がもう仕事を全部終えたわけないでしょ？
He stayed up all night yesterday, so there's no way he's already finished all his work, right?
この限定版スニーカーが、たったの1000円で買えるわけないでしょ？偽物だよ、絶対。
There's no way you can buy these limited edition sneakers for only 1000 yen, right? They're definitely fakes.
親友の結婚式だよ？忙しくても行かないわけないでしょ！
It's my best friend's wedding! Even if I'm busy, there's no way I'm not going, right?! (Of course I'm going!)
彼は「あんな大金、僕が一人で稼げるわけないでしょ」と苦笑いした。
He gave a wry smile and said, "There's no way I could earn that much money by myself, right?"
The last part, "desho," is very important. It makes your strong statement a question. It's like saying, "We both know this is not possible, right?" This shows you are sure. It also asks the other person to agree with you.
This is different from "わけ？". That means "So, you mean...?" It asks about a surprising reason. This is also different from "〜のか？". That just asks if something is true. This phrase is only for saying something is impossible.
Watch out: People sometimes mix up 〜わけないでしょ？ and 〜はずがない. Both mean something is not possible. But 〜はずがない is about what you expect. 〜わけない is about what makes sense. It is about how things usually are. 〜わけないでしょ？ is stronger. It asks you to agree that something is silly or wrong.
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