虚拟语气详解
一、if条件句中的虚拟语气
| 时间 | if从句 | 主句 |
|---|---|---|
| 与现在相反 | did/were | would/could + do |
| 与过去相反 | had done | would/could + have done |
| 与将来相反 | should do/were to do | would/could + do |
例句： - If I were you, I would study harder.（与现在相反） - If he had got up earlier, he wouldn't have been late.（与过去相反）
二、名词性从句中的虚拟语气
表示建议、要求、命令的动词后：
动词 + that + 主语 + (should) + do
常用动词：suggest, propose, insist, demand, request, order
He suggested that we (should) start early.
三、wish的虚拟
| 时间 | 从句时态 | 例句 |
|---|---|---|
| 与现在相反 | 过去式 | I wish I knew the answer. |
| 与过去相反 | 过去完成式 | I wish I had studied harder. |