3、表示与将来事实可能相反的假设和结果。如: If it were Sunday tomorrow, I should　 (would，could，might) go to see my grandmother. 如果明天是星期天，我就 (可能)去看望我奶　　　 奶。If it were to snow this evening, they would not go out. 如果今晚下雪，他们将不出去了。

　　 条件句有两类，一类是真实条件句，一类是虚拟条件句。如果假设的情况是有可能发生的，就是真实条件何。在这种真实条件句中的谓语用陈述语气。如: If it doesn’t rain tomorrow, we will go to the park. 如果明天不下雨，我们就去公园。

如果假设的情况是过去或现在都不存在的，或将来不大可能发生的，则是虚拟条件句。如: 　　If he had seen you yesterday, he would have asked you about it. 如果他昨天见到你，他会问你这件事的。(事实上他昨天没见到你，因此也未能问你这件事。)

在含有虚拟条件句的复合句中，主句和从句的谓语都要用虚拟语气。现将虚拟条件从句和主句的动词形式列表如下:

注: 主句中的should只用于I、we，但在美国英语中，should常被would代替；从句中的should　 可用于各种人称。

l、表示与现在事实相反的假设和结果。如: If my brother were here, everything would be all right. 要是我哥哥在这儿 ，一切都没问题了。

2、表示与过去事实相反的假设和结果。如: If you had taken my advice，you wouldn't　　 (couldn’t) have failed in the exam. 如果你按照我的建议去做，你一定不会(不可能)考试不及格。

l、语气：语气是动词的一种形式，它表示说话人对某一行为或事情的看法和态度。

2、语气的种类：

(1)陈述语气: 表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。如：We are not ready. 我们没准备好。What a fine day it is!多好的天气啊!

(2)祈使语气: 表示说话人的建议、请求、邀请、命令等。如: Open the door, please。请打开门。

(3)虚拟语气: 表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如: If I were you, I should study English. 如果我是你，我就学英语了。May you succeed! 祝您成功！

61.DDCBC　　 66.DBDBB　　 71.BCBCC　　 76. CAABC

41.BBBAD　　 46.CDACD　　 51.BCDCD　　 56.DBBAA

21.CBBDD　　 26.DBACB　　 31.AAABB　　 36.DCDBB

1. DBBCD　　 6. CABCD　 　11.BBBBC　　 16.DDACD

80. ---Brad was Jane’s brother!

　 ---____. He reminded me so much of Jane!

A.　　 No doubt　 B. Above all　 C. No wonder　 D. Of course

Keys to the vocabulary exercises

73. I think it____ to let farmers have their own land. In that way, they can farm the land by themselves, and food production will be higher.　 　 A. no good　 B. makes sense　 C. talks sense　　 D. usefulness　 74.Our English teacher ______ our buying a good English-Chinese dictionary. 　 　A. asked　　　 B. ordered　　　 C. suggested　　　 D. required 75.The rescue team made every ______ to find the missing mountain climber. 　 A. force　　　 B. energy　　　 C. effort　　　 D. possibility 76. ----Are you free after school? 　 ----Sorry. I’ve planned to treat a friend of mine to dinner ______ for his help. 　 A. in order　　　 B. in turn　　　 C. in return　　　 D. in honour 77.　　The new law will come into ______ on the day it is passed. 　 A. effect　　　 B. use　　　 C. service　　　 D. existence 78.　　 ----What a pleasant ______ these trees give us! 　 ----Why not stop and enjoy the cool air? 　 A. shade　　　 B. shadow　　　 C. picture　　　 D. scene 79. However, at times this balance in nature is ____ , resulting in a number of possible unforeseen effects.

A. troubled　　 B. disturbed　　 C. puzzled　　 D. confused

72. The conference gives a chance for people of different　__ to exchange. A. points　B. thoughts　C. views　D. ways