无事生非的英文：
[Literal Meaning]
no/matter/produce/trouble
to make trouble out of nothing

[解释]
没有原因地找麻烦。

[Explanation]
to make trouble out of nothing

[例子]
这段时间大家情绪都不太好，你就不要无事生非了。

[Example]
Everybody has a bad mood lately and you should not make trouble out of nothing.

[英文等价词]
to kick up a fuss

What a fuss about nothing!
真是无事生非！

The whole controversy is for too much ado about nothing.
这场争论完全是无事生非。