you talk as if you had been there

为什么不可以as if you were really there?
为什么用与过去相反，不能用与现在相反吗

if you want to study abroad ,try to talk to dream as if you could live forever, live as if you would die today what will you do if you win 8 million lottery?(talk about your opinion) If you death ,about you talk to me?看下对不 dream as if you will live forever,live as if you will die tomorrow这句话的正确翻译是什么? as...as if用法 if you can can,you can can as you can can If only I _would_ play the guitar as well as you.为什么不能用could? If you love me as i love you,what knife can cut our love in two. If you keep on crying for the missed sun, you will miss the stars as well...