2019屆高考英語基礎語法復習
would
could + 動詞原形
might
3.混合時間的虛擬語氣
如果條件句中的動作和主句的動作不是同時發生，主句和從句的謂語動詞的形式應分別根據各自所表示的時間加以調整。
1)0if i had received the passport yesterday, i would start today.
2)if he had telephoned me last night, i would see him now.
3)if he had followed the doctor’s advice, he would be all right now.
4)if china had not been liberated, the working people would still be leading a miserable life.
4.should/ could / might/ ought to + have done 表示“過去本應該/可以做而實際上卻沒做”
needn’t have done 表示“過去沒必要作而實際上做了”
5.虛擬語氣中的倒裝句
如果虛擬語氣的條件從句謂語動詞中含有were, had, could, should，有時可將if省去，而將條件從句的主語置于were, had, should, could 之后。
had you invited us, we would have come to your party.
were i you, i would do more practice after class.
could she lend us a helping hand, she would do so.
6.wish 后面的賓語從句的謂語動詞應使用虛擬語氣， 表示“可惜…；….就好了； 悔不該…； 但愿…。”
主句謂語 從句謂語
wish 時態 謂語動詞的形式
現在時
表示與wish同時發生 動詞用過去時
be動詞用were
過去時
表示在wish之前發生的動作 動詞用had done
be用had been
將來時
表示在wish之后發生的動作 動詞用would do; should do
be 用 would be ; should be
1)i wish i knew the key to the answer.
2)i wish i were ten years younger.
3)i wish that i had gone to the football match last week.
4)i wish that you had been here yesterday.
5)he wishes that we would visit the old school.
7.表示命令或建議動詞suggest, insist, propose, desire, demand, request, order, command 后的賓語從句中應使用虛擬 should +動詞原形； should 不可用would 來替代; 主句所使用的動詞時態不限。
8.suggest 為“建議去做…; 命令…”從句用should + do
為“ 說明； 暗示”, 從句用過去時或過去完成時。
1) the doctor suggested that i should take the medicine three times a day.
2) the doctor suggested that my grandmother had caught a bad cold.
9.insist “堅持要去做…，堅持應該去做”，從句用should + do為“堅持表明，堅持說/解釋”， 從句用過去時或過去完成時。
10.虛擬語氣也用于表語從句和主語從句中，表示間接的命令、要求、請求、建議、決定等，主句的主語通常是suggestion, proposal, request, order, idea 等。表語從句中的謂語動詞是should +動詞原型，should 可以省略。
11.在主語從句中，當從句用來表示驚奇、不相信、惋惜等，從句的謂語動詞用需擬語氣形式。其謂語動詞時should + 動詞原型， 或should 省略。
三.鞏固練習
1. if there were no subjunctive mood, english _________ much easier.
a. will be b. would have been