我是把中文统统过滤掉,直接看例句,理解意思,体会用法...
总结一下,就是完全根据语意。分享一下我错过的一道题,这道题关键就是要读懂句意,知道主语到底是啥,是"rising ..."这个v-ing动作(动名词)呢,还是rates这个复数名词("rising"作为adj.) 这样的题目,根本无法用语法去套,还是要靠自己logical judgement,就是根据语意。
Rising commercial real estate rates,
a gauge that brokers use to determine the strength of the housing market, is likely to deter many new homeowners from buying houses this spring.
Choices
A
a gauge that brokers use to determine the strength of the housing market, is
Your answer was incorrect
Choice A is not the correct answer. This sentence contains a subject-verb agreement error. The plural subject "rates" should be paired with a plural verb; however, the singular verb "is" has been used in this sentence.
B
that brokers use as a gauge to determine the strength of the housing market, is
Choice B is not the correct answer. This sentence contains a subject-verb agreement error (the plural subject "rates" is paired with the singular verb "is"). The appositive phrase has been changed to a clause in this sentence, but the word "that" is incorrectly used because the clause contains non-essential information. Notice that the meaning of the sentence will not change if this information is removed. The word"which" should be used instead.
C
a gauge used by brokers in determining the strength of the housing market, is
Choice C is not the correct answer. This choice still contains the subject-verb agreement error, and the appositive phrase has shifted to the passive voice ("gauge used by brokers"). An active voice construction, in which a concrete subject and an action verb are paired, is preferable.
D
that is used by brokers as a determining factor of the strength of the housing market, are
Choice D is not the correct answer. Even though this choice contains a subject and verb that agree ("rates" and "are"),the phrase is problematic because its wording is awkward and unclear, and itincorrectly begins with the word "that."
E
a gauge that brokers use to determine the strength of the housing market, are
Choice E is the correct answer. In this version, the plural subject"rates" is correctly paired with the plural verb "are." The appositive phrase is clear and correct.
This question is testing your ability to recognize and correct a subject-verb agreement error. Notice that the subject of this sentence is the plural word "rates" but that the sentence's verb "is" is a singular verb. The best answer choice will correct this error while also maintaining a coherent organization of ideas within the appositive phrase describing "rates."
https://www.youtube.com/watch?v=66YtfRBzctI&feature=youtube_gdata_playerfrom beatthegmat You are correct that when verb-ing word acts as subject of the clause, the verb is always singular. For example:
Swimming
is fun.
What is fun? Swimming. So swimming is the subject.
Singing
has a therapeutic effect on people.
What has therapeutic effect on people? Singing. So singing is the subject.
Protecting the country from the rule of traitors
is the goal of the commission.
What is the goal of the commission? Protecting the country...= Subject
In the above sentences, "verb-ing word" presents an action. swimming,singing, protecting
Now lets consider this sentence:
Pink dolls are very popular in China.
What are popular - pink dolls. So pink dolls = subject.
Note here that "pink" is an adjective describing the dolls.
Singing dolls are very popular in China.
What are popular - singing dolls. So singing dolls = subject.
Here again "singing" is an adjective describing dolls.
So as you can see, verb-ing word can play different roles.
So the key is to determine if this word simply describes the associated noun or if it actually signifies an action that can act as the subject of the verb. (In grammatical terms - whether it acts as participle or gerund).Now lets come to the sentence in question:
Rising commercial real estate rates
,a gauge that brokers use to determine the strength of the housing market,are likely to deter many new homeowners from buying houses this spring.
Here "rising" is an adjective. It describes the real estate rates. So our actual subject is the noun - rates and hence the plural verb"are".
Yep..an example:
Swimming pools are good for exercising.
Swimming in the pools is a good way of exercising.-- by 会员 babybearmm (2012/3/10 2:29:07)