1.because of... 因为……,由于……
I failed in my career as a writer of fiction entirely because of deficiencies in the education system.
我的小说作家生涯失败了,原因完全是因为教育体制的缺陷 。
2.take responsibility for... 对……负责
Don't worry. If anything goes wrong, I'll take responsibility for it.
没关系,出了问题我兜着 。
3.ahead of... 在……之前
I think he made a tactical blunder by announcing it so far ahead of time.
我认为他在时机远未成熟时就把这事说了出去是一种失策 。