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高三英语语法知识点归纳一、不定式做主语：
1、不定式做主语一般表示具体的某次动作。===动名词doing表示习惯的，经常的动作。
e.g: To finish the building in a month is difficult.
To do such things is foolish.
To see is to believe. (对等)
注: 1).不定式作主语时,谓语用单数
2).当主语较长，谓语较短时，常用it做形式主语，而将不定式放到谓语的后面。
it做形式主语，不定式放在谓语动词之后常用于下列结构中：
(1)It is/was +adj.+of sb. to do…
(2) It is +adj.+for sb.+to do…
It is easy / difficult / hard / foolish / unwise / right / wrong /unnecessary
(3) it is +a +名词+ to do...
It is a pity / a pleasure / a pleasant thing / one’s duty / an honor / ashame / a crime / no easy job… to do
It takes (sb.) some time / courage / patience …to do…
It requires courage / patience / hard work… to do…
注意: probable和possible均可作表语，但possible可以用不定式作真实主语，而probable不能用不定式作真实主语。
It is probable for him to come to the meeting.(错)
It is possible for him to come to the meeting.
It is possible / probable that he will come to the meeting.
高三英语语法知识点总结Ⅰ.单句语法填空
1.Have__a__good time!
解析：考查冠词。have a good time玩得开心。
2.Life is like __an__ ocean: Only __the__ strong-willed can reach the othershore.
解析：第一个空表示泛指，且ocean以元音音素开头，故用不定冠词an;形容词前用定冠词表示一类人，thestrong-willed意为“意志坚强的人”。
3.I can't tell you __the__ way to the Wilson's because we don't have __a__Wilson here in the village.
解析：way后有介词短语作定语，表特指，所以第一空填定冠词the;泛指“一个名叫Wilson的人”，第二空填不定冠词a。
4.__The__ village where I was born has grown into __a__ town.
解析：village后有定语从句修饰，是特指，故第一空填定冠词;泛指“一座城镇”，故第二空填不定冠词a。
5.Every time there was__an__outbreak，a great number of terrified peopledied.
解析：there was+可数名词单数，且“outbreak”以元音音素开头，故用an。
6.__The__ news of the mayor's coming to our school for a visit was given outon the radio yesterday.
解析：句意为：市长来我们学校参观的新闻昨天通过收音机发布了。名词news后有介词短语修饰，起限定作用，表特指，故填the。
7.In Germany, __a__ successful project, which roughly translates as “adopt agrandparent”，has been running with a great success.
解析：句意为：在德国，一个名为“领养祖父母”的项目已成功运行。project为单数可数名词，此处意为“一个成功的项目”，表泛指。故填不定冠词a。
8.—Mom, why can't I have __a__ new bike?
—Dear, you know, money doesn't grow on trees.
解析：句意为：——妈妈，我为什么不能要一辆新自行车?——亲爱的，你要知道，赚钱可不是件容易的事。bike为单数可数名词，是首次提到，此处表泛指，故用不定冠词a。
9.__The__ wish always remains unrealistic that you can come first in thefinal exam when you make no efforts at all.
解析：句意为：你不付出任何努力而想在期末考试中得第一名的愿望是不现实的。wish后有that引导的同位语从句修饰，表特指，故填定冠词The。
10.Your son is in great danger and he needs __an__ immediate operation whichcosts 48,000 yuan.
解析：句意为：你的儿子很危险，他需要紧急手术，费用为48,000元。operation为单数可数名词，且immediate为元音音素开头，故填不定冠词an。
11.I'd like to buy __a__ computer. Could you please give me some advice?
解析：句意为：我想买一台电脑，你能给我一些建议吗?computer为单数可数名词，此处表不确定的事物，表泛指，故填不定冠词a。
12.Zinio is __a__ platform for digital magazines, with more than 5,500magazines from a wide range of publishers.
解析：句意为：Zinio是一个电子杂志平台，拥有来自各出版商所提供的'5,500多本杂志。platform是单数可数名词，此处指“一个平台”，表泛指，故填不定冠词a。
13.What if your first choice is wrong? If so, just give yourself __a__ secondchance.
解析：句意：如果你的第一次选择错误怎么办?如果是这样，要再给自己一次机会。序数词前加不定冠词表示“再一，又一”，所以填不定冠词a。
14.—Would you mind giving me advice on how to improve my record?
—If you make __the__ most of your potential, there will be a rise in yourachievement.
解析：句意为：——给我一些建议使我提高记录好吗?——如果你充分利用自己的潜能，你的成绩就会提高。make the mostof是固定短语，意为“充分利用”，故填定冠词the。
15.With the development of society, our country is badly in need of thosewith __a__ better command of computer skills.
解析：句意为：随着社会的发展，我们国家非常需要那些可以进行电脑操作的人才。with a commandof...为惯用搭配，意为“掌握……”，故填不定冠词a。
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