以后不会发生这样的事 的英语是什么？

Such will never happen again.

It won't happen again.
如果想强调，那就说
It won't happen again， I promise.
很地道的说法

朋友，跟女朋友说吗？

哈哈···

It will never happen again.trust me!

It won't happen again

the thing like this will not hanppen again

It won't happen again in the future.