8、使用上述表示建議、要求、命令等意思的動詞派生的名詞，或在這些動詞用作名詞時，名詞之后的從句用虛擬語氣，即從句的謂語動詞用should+動詞原形，should 可以省略。從句的引導詞that 不能省略。這與上述第7項類似。如：

　　He made a request that he (should) be allowed to take 3 days off. = He requested that he be allowed to take 3 days off.

　　Our suggestion is that education not be industrialized. = We suggest that education not be industrialized.

　　The president’s decision is that the war against terrorism be launched at the right time. =The president decided that the war against terrorism be launched at the right time.

　　9、上述動詞在It is suggested that…, It is required that…, It’s requested that…, It’s ordered that…, It’s arranged that…句型中，that 之后的從句用虛擬語氣，即謂語動詞用should+動詞原形, should 可以省略，但引導詞that 不能省略。如：

　　It was suggested that he attend the conference.

　　It was requested that the trial be openly reported.

　　10、在It’s important (imperative, necessary, essential, vital, desirable, advisable, better) that…句型中，that 引導的從句用虛擬語氣，即謂語動詞用should + 動詞原形,should可以省略。這個句型表示說話人的意見、要求等。

　　For example:

　　It is essential that there should be enough food and clothing for the winter.

　　It is desirable that your wedding be postponed until next July.

　　It is imperative that the board chairman be present at the board meeting.

　　另外，在一些習慣用語中也有虛擬語氣的形式。但最好把這些習慣用語作為一種句型來記住。如：

　　May you be happy!

　　May you succeed!

　　Long live the People’s Republic of China!

　　Everybody leave the room!

　　You had better not resign.

　　I would rather not tell you.

　　總之，虛擬語氣是英語中的一個難點，因為虛擬語氣的用法和句型較多，動詞的變化比較復雜。在學習的時候要逐個過關。同時，也要善于發現虛擬語氣的規律。根據動詞的變化，大致可以把虛擬語氣分為三種：

　　一種是動詞用過去式，過去分詞式，或過去將來式，這主要是用if…, wish, suppose的情況;

　　一種是動詞用should+動詞原形(should可以省略)，這主要用于表示建議、要求、命令等意思的動詞或名詞后面所接的從句，以及It is important (necessary) that…后面所接的從句;

　　一種是動詞用過去式，如It is (high) time (that)…和I would rather 后面的從句。同學們還可以自己總結適合自己的規律，如把虛擬語氣句型可以分為用于簡單句、條件狀語從句、賓語從句、主語從句、表語從句、定語從句、同位語從句等。

　　Now let’s do some exercises to consolidate what we have learned about subjunctive mood:

　　一、單項選擇：

　　1. The teacher demanded that the exam ___before eleven.

　　a. must finish b. would be finished c. be finished d. must be finished

　　2. She made the demand that she ____ at once.

　　a. leave b. leaves c. left d. to be left

　　3. He is talking so much about America as if he ____ there.

　　a. had been b. has been c. was d. been