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题库 / OG2017V-SC-219
According to the Economic Development Corporation of Los Angeles County, if one were to count the Los Angeles metropolitan area as a separate nation, it would have the world's eleventh largest gross national product, that is bigger than that of Australia, Mexico, or the Netherlands.
if one were to count the Los Angeles metropolitan area as a separate nation, it would have the world's eleventh largest gross national product, that is
if the Los Angeles metropolitan area is counted as a separate nation, it has the world's eleventh largest gross national product, that being
if the Los Angeles metropolitan area were a separate nation, it would have the world's eleventh largest gross national product,
were the Los Angeles metropolitan area a separate nation, it will have the world's eleventh largest gross national product, which is
when the Los Angeles metropolitan area is counted as a separate nation, it has the world's eleventh largest gross national product, thus
为什么不选A，而只能选C呢？ that is bigger than that of Australia, Mexico, or the Netherlands修饰world's eleventh largest gross national product和bigger than that of Australia, Mexico, or the Netherlands作定语修饰world's eleventh largest gross national product没有什么区别
one were to 多余，直接说“LA 如果是一个国家的话”就可以，没必要加一句“某人把LA 当作是一个国家的话”
that is 如果前边不加逗号的话还说得通，但是后边的成分是作非限制性定语，不能这样用that引导
from manhattan： you can't use pointing words like "that" and "this" in modifiers that immediately abut the nouns/phrases that they modify, separated only by a comma. instead, you have to use a different sort of noun modifier. -- in this case", and this figure......"
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that只能引导限制性定语从句，排除AB
E体现的句间关系不对，应用虚拟语气
D需要保持时态上的一致
C correct
逗号+that必错
虚拟语气，if + 一般过去时，主句用would。
D选项错在主句用了will，前半部分were提前了，等同于C中的if从句。
虚拟语气
A that只能用于限制性
虚拟语气 因为洛杉矶大都会区现实不可能是一个独立的国家
1that不能引导定语从句，排除AB。
2虚拟语气，DE时态不对，排除。
3选C。
Choice A uses the clause that is. Usage of present tense verb suggests that the said gross national product is currently bigger than that of the countries mentioned in the sentence.
But the sentence intends to present just a hypothetical calculation that does not exist.
虚拟语气；代词
subjunctive mood: contrary to fact state of affairs: were...would have...
A选项：前面句子虚拟语气，后面that is与前文时态不符
B选项：需要虚拟语气
D选项：主句will换成would;which is可以去掉，而且is要符合虚拟的语态；
E选项：语态搞错，要用虚拟语气；同时结尾的thus,使文意发生改变，thus前后没有因果关系，bigger than...只是对于前面的解释说明
if the Los Angeles metropolitan area is counted as a separate nation, 一定要用虚拟语气吗？
对呀，因为LA metropolitan不可能是一个独立的国家，所以主从句都要用虚拟语气。 就像if i were you，i would ...一样，都是假设不可能发生的事
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考察虚拟语气。if + 动词一般过去时，主句 + would + 动词原型。排除/B/D。A选项that is使用出错，排除；E选项直接排除；D选项if语句中were的用法正确，were表示假设，表示虚拟，即还未完成的事情。
虚拟语气：从句谓语形式were to+动词原形，主句谓语形式would/should/might/could+动词原形
c不应该在句尾加一个that is吗？
D选项错在哪里呢，是will用的不对吗？OG解释说which指代不清
虚拟语气要用Would。 which is 非限，OG 说 wordy
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