虚拟语气as if的三种用法
1、从句格式：主语 + were / did
如下例句：
1、从句格式：主语 + had been / had done
如下例句：
1、从句格式：主语 + would / could + do / be
如下例句：
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1、从句格式：主语 + were / did
如下例句：
1、从句格式：主语 + had been / had done
如下例句：
1、从句格式：主语 + would / could + do / be
如下例句：