SAT是Scholastic Aptitude Test的縮寫，是申請幾乎所有美國大學(xué)必須參加的考試。通常，希望繼續(xù)接受高等教育的高中生需要參加SAT考試，并且SAT考試得分是獲取獎(jiǎng)學(xué)金的重要標(biāo)準(zhǔn)之一。大部分美國大學(xué)要求SAT考試作為錄取的條件并根據(jù)SAT得分授予獎(jiǎng)學(xué)金。

　　邏輯主語問題是SAT語法部分的一個(gè)常見問題，對于句子修改題(Improving Sentences)而言更是如此。為了幫助SAT考生迅速理解這個(gè)問題并掌握解決辦法，本文擬從它的常見形式與修改方法兩個(gè)方面進(jìn)行闡述。

　　一 常見形式
　　邏輯主語問題的常見形式有下列幾種：

　　1. 句子以現(xiàn)在分詞開始
　　例如，
　　Lacking good instruction, my mistakes in creating a graph to illustrate historical trends were numerous. ( 句子以現(xiàn)在分詞lacking開始)
　　(A) my mistakes in creating a graph to illustrate historical trends were numerous
　　(B) I made numerous mistakes in creating a graph to illustrate historical trends
　　(C) there were numerous mistakes in the graph I created to illustrate historical trends
　　(D) I created a graph to illustrate historical trends with numerous mistakes
　　(E) The graph I made for illustrating historical trends had numerous mistakes

　　2. 句子以過去分詞開始
　　例如，
　　Carried by the strong, dry winds of the stratosphere, the 1980 eruption of Mount Saint Helens caused dust that crossed the United States in three days and circled the globe in two weeks. (句子以過去分詞carried開始)
　　(A) the 1980 eruption of Mount Saint Helens caused dust that
　　(B) Mount Saint Helens’ eruption in 1980 caused dust that
　　(C) dust from the 1980 eruption of Mount Saint Helens
　　(D) dust from the 1980 eruption of Mount Saint Helens that
　　(E) there was dust from the 1980 eruption of Mount Saint Helens and it

　　3. 句子以介詞加分詞開始
　　例如，
　　By simply entering an internet website or calling a toll-free number, a catalog order can be placed for almost anything from cheesecakes to fully equipped desktop computers. (句子以介詞by加分詞entering…or calling…開始)
　　(A) a catalog order can be placed
　　(B) by placing a catalog order
　　(C) they will place your catalog order
　　(D) you can place a catalog order
　　(E) your catalog order can be placed

　　4. 句子以連詞加分詞或形容詞開始
　　例如，
　　While driving down the road, the house with the large yard and small pond attracted the family’s attention.
(句子以連詞while加分詞driving down…開始)
　　(A) the house with the large yard and small pond attracted the family’s attention
　　(B) the house having the large yard and a small pond attracted the attention of the family
　　(C) the house with the yard and small pond was attractive to the family’s attention
　　(D) the family’s attention was attracted by the house with the large yard and small pond
　　(E) the family was attracted to the house with the large yard and small pond