I didn't know anything about it...

我对此事一无所知......




It's not my turn to...

这次不是轮到我......




He / She made me do it.

他(她)要我做的.




It's not my fault.

那不是我的错.




I've had so many other expenses...

我有太多其它的费用要付......




Money has been really tight lately...

最近手头有点紧......




We weren't playing for real.

我们不是玩真的.




That doesn't count.

那不算的!