New Jersey has one of the five highest numbers of reported cases of Lyme disease in the United States.

　　Upset by the recent downturn in production numbers during the first half of the year, the board

　　

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　　of directors, at its quarterly meeting, raised the possibility of adding worker incentives.

　　这些情况下，如果明确知道有多个数字，就用numbers。再例如Don't judge a team by its numbers.不能仅仅从数字(指标)上判断一个队(的好坏)。如NBA队伍中每个球员都有rebound, assist, turnover, score等指标，球队有胜率，排名等指标。这些指标就是由多个数字表达的，所以即使team是单数，但是its + numbers是最合理的。上面的句子也可以改写为：Don’t judge a team by those numbers listed on its website.

　　7.2 numbers作为核心词，但可以被具体化的几个数倾向不明显

　　The gyrfalcon, an Arctic bird of prey, has survived a close brush with (A) extinction; its numbers are now five-times greater than when the use of DDT was sharply restricted in the early 1970’s.

　　因为动词是复数，所以可推知numbers是number的复数形式，而不是什么固定用法。

　　In Scotland, the (E) wild salmon's numbers have been reduced by uncontrolled deep-sea and coastal netting, by pollution, and by various other threats to the fish’s habitat.

　　另外，一些讨论中说：numbers是复数做“人数，鸟群”讲。Longman字典：Visitor numbers increase in the summer. 游客人数在夏季增加。现代英汉词典：Birds gather in large numbers beside the river.鸟儿一群群地聚在河边。但是显然后面一个例子中in large numbers是做副词用。

　　这一类用法是最难的，还没有找到最有说服力的解释。但是作题的时候，我们可以借用其他方面的线索，排除错误项。

　　7.3 in number(s) 惯用法: 如downturn/decline in number(s)，表示在数量指标方面

　　In number adv., prep., n.总共，在数目上

　　They were printed in limited numbers

　　Young people have been leaving the countryside in large numbers for urban areas. [leave … for …+

　　The condors have dwindled to an estimated sixty in number.

　　The golden crab of the Gulf of Mexico has not been fished commercially in great numbers, primarily because it lives at great depths �C 2,500 to 3,000 feet down.

　　Once common throughout the Western plains, black-footed ferrets are thought to have declined in numbers as a result of the poisoning of prairie dogs, their prey. 这题主要是考察逻辑关系：black-footed ferrets (is) common throughout …, 只有A正确。

　　7.4 the number (s) of + 名词单数或者复数 + 动词单数或者复数，表示标号，数字标志

　　这时number是核心词，number、物品、谓语动词三者的单/复数形式要一致

　　The numbers of the machine parts A and B are respectively 201 and 203.

　　机器零件A和B的标号分别是201和203。

　　派生出The number of machine part A is 201.

　　这时number与numbers互为单复数的关系。注意，这里。

　　The numbers of the machine parts are not available. 这些机器零件的号码找不到了。

　　(not) one of the+名词复数+单数形式谓语;Not one of =none of。

　　amount修饰不可数名词，不能用来修饰4,000(drive-ins)这个可数的量。

　　8. 主谓一致注意事项：

　　原则： 句子中必须含有一套完整的主位结构;一个动词必须在数量上和主语一致。

　　

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　　排除： 主要的主语和主要的谓语发生不一致的情况;

　　主要的主语和主要的谓语在形容词性从句和其他非独立句上不一致;

　　原则： 一句话的主语绝对不会嵌在一个介词词组内;

　　若主语是复数;GMAT的通常做法是拿一个单数名词放在动词旁边;混淆你的视线

　　若主语是单数;GMAT的通常做法是拿一个复数名词放在动词旁边;混淆你的视线

　　Eg: The start of the races that will be run by the best athletes are at 6 pm. 错误

　　The start of the races that will be run by the best athletes are at 6 pm. 正确

　　原则： 请注意下列特殊的名词，单复数使用的情况;

　　① 集合名词： 需要用单数

　　② 代词 ： 分成3类

　　1)单数： each, every, anyone, everyone, nobody;

　　2) 复数： Both, few

　　3) 不定： all, Some, most, majority根据作用者的情况来确定单复数

　　③ 复合名词： 用and连接的全部用复数;

　　④ 名词从句： 以what开头的句子一般通常是单数;

　　⑤ 动名词 ： 名词以ing结尾的一般用单数;

　　暗示： 如果你碰到一下情况请检查主谓是否一致;

　　① 选项的区别在于使用的单复数不同;

　　② 句子满是形容词性从句和介词词组的;

　　③ 我们刚才讨论的不寻常的名词作为句子主语

　　9.作业

　　1. In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.

　　(A) in how the two ears hear a given sound help the listener determine

　　(B) in the two ears hearing a given sound help the listener in determining

　　(C) in how a sound is heard by the two ears helps the listener determine

　　(D) between how the two ears hear a given sound helps the listener in determining

　　(E) between how a sound is heard by the two ears help the listener in determining

　　通过读句子的逻辑语义，我们确定实语义是 differences in...help the listen determine

　　得出句子的主语是differences 谓语是help 根据语义我们知道help sb do sth