情态动词和虚拟语气（1）
语法知识精练 I．单句填空
1．(2016·浙江高考)George ________ (go)too far.His coffee is still warm.
2．(2016·江苏高考)If it ________ for his invitation the other day，I should not be here now.
3．(2016·天津高考)It was really annoying; I ________ get access to the data bank you had recommended.
4．(2016·北京高考)I love the weekend，because I ________ get up early on Saturdays and Sundays.
5．(2016·全国Ⅰ)A code uses symbols to replace words，phrases，or sentences.To read the message of a real code，you________have a code book.
6．(2016·天津高考)I was wearing a seatbelt.If I hadn’t been wearing one，I ________ (injure)．
7．(2016·天津高考)I told her she shouldn’t swim after a whole night’s coughing，but she refused to give up and insisted she ________ (go)．
8．(2016·浙江高考) Had the governments and scientists not worked together，AIDS－related deaths ________(fall) since their highest in 2005.
9．(2016·浙江高考)I ________ (be)a different person if my mom hadn’t turned a silly bicycle accessory into a life lesson I carry with me today.
10．(2016·北京高考)Why didn’t you tell me about your trouble last week? If you________(tell)me，I could have helped. 【答案解析】
1．can’t have gone 句意：乔治不可能走得太远了。他的咖啡仍然是温的。can’t have done是对过去的否定推测，意为“不可能做了某事”。
2．had not been 考查虚拟语气的用法。句意：如果不是他前几天邀请我，我现在就不会在这里。根据句子结构和句意可知，此处为虚拟语气，再结合时间状语the other day可知，这是发生在过去的行为，故if从句要用过去完成时。
3．couldn’t 句意：这真令人生气；我不能进入你推荐的数据库。couldn’t不能。
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4．needn’t 5.must
6．would have been injured 句意：我当时系着安全带。如果我没有系安全带，我就会受伤。考查虚拟语气。根据if条件句用的had done可知，主句应用would have done表示对过去情况的虚拟，而且I和injure是被动关系。
II．语法填空（语篇填空）【甘肃省兰州第一中学2017届高三9月月考】语法填空（共10小题；每小题1.5分，满分15分）
阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
It is suggested that extinct animals can possibly come back to life through cloning sometimes, but 1 (fortune), this is either impossible 2 unsuitable. The reasons are as follows：
3 is required is that you need perfect DNA and enough 4 (diverse) in the group to overcome illnesses, which means having animals with their genes 5 (arrange) in different ways. The advantage is 6 if there is a new illness some of these animals may die, but others will survive. A suitable habitat would 7 (need) for the extinct animals to lead a natural life, so it would be 8 (fair) to clone any of them if they were to live in a zoo.
9 (base) on the reasons above, we are a long way from being able to clone extinct animals, so the chance of dinosaurs ever returning to the earth is 10 (mere) a dream. 【答案】 1.unfortunately 2.or 3.What
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4.diversity 5.arranged 6.that 7.be needed 8.unfair 9.Based 10.merely
4.diversity 句意：你需要完美的DNA和足够的差异来克服疾病。enough在这里是形容词，修饰名词，故填diversity。
5.arranged with的独立主格结构，genes和arrange之间是被动关系，用过去分词，故填arranged。
6.that 此处是that引导的表语从句，不做成分，只起引导作用，故填that。
7.be needed 句意：一个合适的产地将被需要。含情态动词的被动语态，故填be needed。 8.unfair 句意：克隆他们当中的任何一个将是不公平的。可知此处填unfair。 9.Based be based on以---为基础，此处是过去分词作状语，故填Based。
10.merely 句意：恐龙曾经回归地球的机会只是一个梦想。副词修饰整个句子，故填merely。
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