反 vs 反而（近义词）

1)反 or 反而 means"to lead to a contrary result".What precedes it states the contrary condition,with or without 不但没有 (not only…not),不再 (no longer),etc.反 is more literary.
2)In examples①and③the two words are interchangeable,but 反 is more literary.Example②is very colloquial,so 反而 ought to be used.
3)Sometimes 反 or 反而 is used by contrast to show that sth.defective or abnormal becomes desirable:
4)反是 is rare,so in example⑤反而是 is used.
5)Note:反 is also an adjective meaning"reverse or opposite",e.g.:
6)反 is also a verb meaning "to be against or to reverse",e.g.: