even if 的用法
    even if的用法
    1. 引导条件状语从句
    even if 引导条件状语从句，表示即使或尽管的意思，相当于no matter how, whatever等：
    Even if it rains, we shall go ahead with the picnic.
    2.对否定句作强调
    even if也可以用于强调否定句：
    You won't pass the exam, even if you work hard.
    3. 用于感叹句whatever什么意思
    even if也可以用于感叹句中，以表示强烈的感叹或不可思议：
    Even if I had known the truth, I wouldn't have believed it.。