在应对AEIS语法考试时，有很多需要大家掌握的基础知识，但是其中的误区也是需要大家重点关注的，必然虚拟主语部分，今天小编就为同学们带相关的介绍，希望能够帮助大家更好的应对考试，下面就和小编一起看看吧！
Writers, especially beginning writers, are often cautioned against using passive voice in their writingbecause its use slows down the pace.
由于被动语态会影响节奏，作者们(特别是初学者)经常被警告不要使用它。
Another construction that can make your writing plod is the dummy subject.
还有一种结构也会让你的文章变得拖沓，它就是虚主语。
When we use the words it and there to begin a sentence without a referent (a noun the pronoun is referring to), we’re using a dummy subject.
虚主语是指句子开头的it或there没有指代物(it、there指代的名词)。
In this pair of sentences:
下面两个句子中：
I went to see Fantastic Four 2 over the weekend. It was fun, but mostly forgettable.
“It” refers to the movie Fantastic Four 2. The pronoun has a referent.
It指代电影《神奇四侠2》。这个代词有指代物。
In this sentence, however:
但这个句子里：
It is apparent that oil reserves will be exhausted by 2050.
“It” has no referent, and is therefore a dummy subject.
It没有指代物，因此它是虚主语。
The same thing happens frequently with there:
这种情况也经常发生在there开头的句子上：
There are several ways in which you could begin.
There are five stages of grief.
Dummy subjects are just one of many problems that weaken your writing by making it vague, fuzzy, and indefinite. The sentences above can be reconstructed with stronger, more definite subjects:
虚主语是让你的文章变得含糊不清的诸多原因之一。上面的句子可以用更有力、更明确的主语加以改写：
Some experts warn that our oil reserves will be exhausted by 2050.
You could begin in one of the following ways: (followed by a list).
Elisabeth Kubler-Ross identified five stages of grief in her book On Death and Dying.
In general, unless you don’t know who is performing an action, or you want to emphasize the action of the sentence for some reason, you should avoid dummy subjects.
通常情况下，除非你不知道动作由谁做的，或是出于某种原因想要强调动作本身，否则你应该避免使用虚主语。
以上就是小编为大家带来的关于AEIS考试备考介绍，希望同学们能够合理的掌握，更加熟悉备考资料。想要获取更多AEIS阅读考试等更多信息，大家可以线上咨询客服哦！最后小编预祝大家能考取心中满意成绩。
