Suddenly, I'm not half the man I use to be
突然，我已不是过去的我
There's a shadow hanging over me
总有一个阴影游荡在我的脑海里
Oh yesterday came suddenly
哦，昨天来得太突然了

Why she had to go, I don't know
她为什么离我而去，我不得而知
She wouldn't say
她也不会告诉我
I said something wrong
可能是我说错了些什么
now I long for yesterday
如今，我怀念昨天

Yesterday...
昨天
Love was such an easy game to play
爱是如此简单的一个游戏
Now I need a place to hide away
现在的我无处躲藏
Oh I believe in yesterday
哦，我信仰昨天

随手翻译，有不足之处，请多指教！！！