掌握SAT语法知识点是大家备考SAT语法考试的时候最重要的内容，下面天道小编为大家整理了关于句子结构方面的SAT语法知识点分析，主要集中在了句子结构混乱和冗长这个问题上，希望能给大家的备考提供一些帮助和借鉴。

　　Run-On Sentences

　　A run-on sentence results when two complete sentences get jammed together.Run-ons usually sound breathless, as if an excited child is telling a story. Here’san example of a run-on sentence:

　　I walked into the pet store and asked the clerk if she had any talking parrots, this made her roll her eyes.

　　The best way to test if a sentence is a run-on is to split the sentence in two andsee if both halves of the sentence could function alone:

　　I walked into the pet store and asked the clerk if she had any talking parrots. This made her roll her eyes.

　　Because each half of this sentence is complete on its own, the two halves cannotbe joined together with a comma.

　　Here are three ways to fix run-on sentences in Improving Sentences questions:

　　Method 1: Use a semicolon.

　　Method 2: Add a conjunction.

　　Method 3: Make the clauses relate clearly.

　　Method 1: Use a Semicolon

　　One of the most common remedies you’ll find on the SAT is a semicolon. A semicolon (;) signals that both sides of the sentence are grammatically separate but closely related to one another.

　　I walked into the pet store and asked the clerk if she had any talking parrots; this made her roll her eyes.

　　Method 2: Add a Conjunction

　　Another method for correcting run-on sentences is adding conjunctions. Suppose you see this run-on sentence:

　　In her incredible eagerness to cheer her team to victory, Amy the cheerleader has lost her voice, therefore her performance at the games is a silent one.

　　If you add the conjunction and:

　　In her incredible eagerness to cheer her team to victory, Amy the cheerleader has lost her voice and therefore her performance at the games is a silent one.

　　The run-on disappears.

　　以上就是关于句子结构的SAT语法知识点分析，包括了详细的处理句子结构混乱的方法等内容，都是英文版的，没有例题做解析。大家在备考自己的SAT语法考试的时候，可以选择适当的题目进行练习和整理。