其他狀語從句的虛擬語氣
1. 目的狀語從句中的虛擬語氣
(1) 在for fear that, in case, lest引導的目的狀語從句中，若用虛擬語氣時，從句謂語為： should + 動詞原形。并且 should不能省略
She examined the door again for fear that a thief should come in. 她又把門檢查了一遍，以防盜賊的進入。
He started out earlier lest he should be late. 他很早就出發了以防遲到。
(2) 在so that, in order that所引導的目的狀語從句中，從句中的謂語為： can / may / could / might / will / would / should + 動詞原形。如(from http://www.enmajor.com/)：
He goes closer to the speaker so that he can hear him clearer. 他走近說話的人以便能挺得更清楚。
He read the letter carefully in order that he should not miss a word. 他把信讀得很仔細以便不漏掉一個單詞。
2. 讓步狀語從句中的虛擬語氣
(1) 在even if, even though 所引導的讓步狀語從句中，可用虛擬語氣，主句、從句的結構與if所引導的條件從句結構相同。如：
Even if he were here himself, he should not know what to do. 即是他親自來也不知該怎么辦。
Nobody could save him even though Hua Tuo should come here. 及時華佗再世也就不了他。
(2) 在whatever， whichever，whenever，whoever, wherever，however, no matter wh-word 等引導的讓步狀語從句中，從句虛擬語氣結構為：
① may +動詞原形(指現在或將來)。如：
We will finish it on time no matter what / whatever may happen. 不管發生什么事，我們都要按時完成。
We will find him wherever / no matter where he may be. 無論他在哪里，我們都要找到他。
I will wait for him no matter how late he may come. 不管他來的多么晚，我都會等他。
② may +完成式(指過去) ，主句結構不限。如：
You mustn’t be proud whatever / no matter what great progress you may have made. 不管你取得了多么大的進步，你也不能驕傲(from http://www.enmajor.com/)。
We must respect him no matter what / whatever mistakes he may have made. 不管他翻過什么錯誤，我們必須尊敬他。
(3) 在though, although等引導的讓步狀語從句中，從句虛擬語氣結構為 should +動詞原形，主句結構不限。如：
Although / Though he should often be late, he is a good student. 盡管他經常遲到，他還是個好學生。
Although / Though he should be secretary, he must obey the rules. 盡管他是書記，他也必須遵守規定。
3. 方式狀語從句中的虛擬語氣
as if, as though引導的方式狀語從句常用虛擬語氣。虛擬語氣的結構為：
表示所發生的時間 虛擬語氣結構
發生在主句動作之前 had + 過去分詞
與主句動作同時發生 過去時(be 用were )
發生在主句動作之后 would / could / might / should+原形動詞
例如：
They began to talk warmly as if they had known each other for long. 他們開始熱烈的談論起來就好像他們已相互認識很久了。
He coughed twice as if someone should come. 他咳嗽兩聲就好像有人要來了。
4. 原因狀語從句中的虛擬語氣
amazed, angry, annoyed, astonished, disappointed, frightened, happy, pleased, proud, sorry, surprised, upset等后面的狀語從句中常用虛擬語氣。其虛擬語氣的結構為：
① should + 原形動詞(指現在或將來)。如：
He was angry that you should call him by name. 他很生氣，你竟然對他直呼其名。
I was astonished that he should not answer such an easy question. 我很驚訝他竟答不出如此簡單的問題。
② should + 完成式, 指過去。如：
I’m very sorry that you should have failed the exam. 我很遺憾，你這次考試竟然失敗了。
I was very surprised that Father should have known what I did yesterday. 我很吃驚，父親竟指導我昨天所作的事情(from http://www.enmajor.com/)。
