下面是4道SAT语法练习题的内容，是关于SAT语法改进句子类型的。SAT语法考试对于中国的考生来说还是与一些难度的，所以需要大家不断的练习才能真正掌握。下面我们就一起来看看这4道SAT语法练习题有哪些可取之处吧。

　　1. Based on accounts of various ancient writers, scholars have painted a sketchy picture of the activities of an all-female cult that, perhaps as early as the sixth century B.C., worshipped a goddess known in Latin as Bona Dea, "the good goddess."

　　(A) Based on accounts of various ancient writers

　　(B) Basing it on various ancient writers&apos accounts

　　(C) With accounts of various ancient writers used for a basis

　　(D) By the accounts of various ancient writers they used

　　(E) Using accounts of various ancient writers

　　2. Formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses, because they are growing and are seldom in equilibrium.

　　(A) Formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses, because they are growing and are seldom in equilibrium.

　　(B) Because they are growing and are seldom in equilibrium, formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses.

　　(C) Because they are growing and are seldom in equilibrium, new small businesses are not subject to the same applicability of formulas for cash flow and the ratio of debt to equity as established big businesses.

　　(D) Because new small businesses are growing and are seldom in equilibrium, formulas for cash flow and the ratio of debt to equity do not apply to them in the same way as to established big businesses.

　　(E) New small businesses are not subject to the applicability of formulas for cash flow and the ratio of debt to equity in the same way as established big businesses, because they are growing and are seldom in equilibrium.

　　3. State officials report that soaring rates of liability insurance have risen to force cutbacks in the operations of everything from local governments and school districts to day-care centers and recreational facilities.

　　(A) rates of liability insurance have risen to force

　　(B) rates of liability insurance are a force for

　　(C) rates for liability insurance are forcing

　　(D) rises in liability insurance rates are forcing

　　(E) liability insurance rates have risen to force

　　4. Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.

　　(A) at 40 to 44 million years old provide evidence of

　　(B) as being 40 to 44 million years old provides evidence of

　　(C) that it is 40 to 44 million years old provides evidence of what was

　　(D) to be 40 to 44 million years old provide evidence of

　　(E) as 40 to 44 million years old provides evidence of what was

　　参考答案：

　　Answer to Question 1

　　In choice A, the introductory clause beginning Based on modifies scholars, the noun that immediately follows it: in other words, A says that scholars were based on the accounts of various ancient writers. Choice B is awkward and imprecise in that the rerent for the pronoun it is not immediately clear. C and D are also wordy and awkward, and in D By the accounts... they used is an unidiomatic and roundabout way of saying that scholars used me accounts. E, the best choice, is clear and concise; it correctly uses a present participle (or "-ing" verb) to introduce the modifier describing how the scholars worked.

　　Answer to Question 2

　　In A, the they after because is ambiguous; it seems illogically to rer to Formulas because they and Formulas 158 are each the grammatical subject of a clause and because the previous they rers to Formulas. In A and B, do not apply to... in the same way as they do to is wordy and awkward. D, the best choice, says more concisely in the same way as to. Also in B, because they rers to formulas, the introductory clause states confusedly that the formulas are growing. In C and E, subject to the [same] applicability of... is wordy, awkward, and imprecise; furthermore, are is prerable either bore or after established big businesses to complete the comparison. Finally, the rerent of they is not immediately clear in E.

　　Answer to Question 3

　　In choices A and B, rates of is incorrect; when rates means "prices charged," it should be followed by for. Also in B, are a force for does not accurately convey the meaning that the soaring rates are actually forcing cutbacks in the present. In A and E, it is redundant to say that soaring rates have risen. Similarly, the word rises makes D redundant. C, the best choice, is idiomatic and concise, and it correctly uses the progressive verb form are forcing to indicate an ongoing situation.

　　Answer to Question 4

　　D, the best choice, correctly follows estimated with to be. The other choices present structures that are not idiomatic when used in conjunction with estimated. Choices B, C, and E all mismatch the singular verb provides with its plural subject, fragments, and in choices C and E, what was is unnecessary and wordy. In choice C, the use of the verb phrase estimated that it is produces an ungrammatical sentence.

　　以上就是这四道SAT语法练习题的全部内容，后面附有答案解析，SAT语法改进句子题型要求考生掌握语法知识的同时注意语言表述的清晰，准确和简洁，大家在备考这一类型的SAT语法练习题的时候，可以根据这个原则进行。

更多SAT语法相关：

3道SAT语法改进句子练习题

SAT语法笔记知识点之主谓一致

两道SAT语法完成句子题

更多出国留学最新动态，敬请关注澳际教育手机端网站，并可拨打咨询热线：400-601-0022