是If could be worse还是It could be worse?

问题描述:

是If could be worse还是It could be worse?

It could be worse!
可能会更糟!

it could be worse
参见新概念英语书

实际都有可能出现吧,当然规则点的说法是It could be worse,可能会很糟
但If could be worse在口语里出现也不是不可能啊,比如:if could be worse,why not change another one?如果那样会很糟的话,何不换一个...