犯错相关的口语：
 you goofed again 你又弄砸了
 i don't want any foul-ups 不许再搞砸了
look waht you have done 看看你干了什么
you blew it 你坏了事
he never hits a sour note 他从来没出过半点错
i am almost never wrong 我几乎不曾做错过什么
relax,what could possibly go wrong 放心吧，哪会出什么纰漏
we have to start over again我们必须再做一遍
let us go back to where we started我们重回出发点
there is very little room for mistakes只允许犯很少的错误

英语教室:
you can't please everyone 你不可能讨好每一个人
i am working on it  我正努力
for the time being 暂时
this milk has gone bad这牛奶变质了