わけがない
文法の解説は英語です。
用法
Used to emphasise the fact that something is impossible, of that there is no good reason to believe that it would be possible
例文
そんなに安いわけがない
There is no was that X is so cheap
お金がないのだから、家を買えるわけがない
I have no way, so there is no way I can buy a house