虛擬語氣知識點思維導圖如下： 1. 定義和種類
虛擬條件句（if...had done）
虛擬結果句（if...had been）
假設條件句（as if...） 2. 結構特點
主語、謂語動詞形式與實際相反
賓語從句或主句中的主語省略 3. 用法示例
虛擬條件句：If I had gone to the party, I would have met you there.
虛擬結果句：If he had won the lottery, he would have bought a new car.
假設條件句：As if she were a teacher, she would teach us English.

1. 虛擬語氣表示假設或非真實情況，與事實相反。 2. 虛擬語氣分為三種：對過去的虛擬、對現在的虛擬、對將來的虛擬。 3. 對過去的虛擬：If I had done, I would have done. 4. 對現在的虛擬：If I did, I would do. 5. 對將來的虛擬：If I were to do, I would do. 6. 虛擬語氣用于各種從句，如賓語從句、主語從句、表語從句等。 7. 虛擬語氣在特定句型中也有特殊用法，如It's (high) time that... 8. 虛擬語氣在寫作中用于表達愿望、建議、命令等。 9. 虛擬語氣在語法填空中不作為考查熱點，但在寫作中能起到美化文章的作用。