"非常不正常" 英文表达可以是 "abnormal" 或 "unusual"。

"Abnormal" 来自拉丁文 "abnormis"，意思是 "not normal or usual"。例如：

Her behavior was abnormal for someone in her position. 她的行为对于她的职位来说是不正常的。
The results of the test were abnormal. 测试结果是不正常的。

"Unusual" 来自拉丁文 "unusuaps"，意思是 "not usual or normal"。例如：

It's unusual for him to be late. 他迟到是不正常的。
The weather has been unusually hot this summer. 今年夏天的天气异常热。