下面的内容是小编为大家整理出的关于新SAT语法中小逗号的大作用是什么，希望可以帮助到各位。
1. 逗号：用于连接一个句子中的并列成分(公式：a and b 或者a, b, and c)
真题讲解：新SAT OG-T1-Q4：Whey to Go
Yogurt manufacturers, food [Q4] scientists; and government officials are also working together to develop additional solutions for reusing whey.
Question 4
A. NO CHANGE (scientists; and)
B. scientists: and
C. scientists, and
D. scientists, and,
本题中，yogurt manufacturers, food scientists与government officials是并列成分，按照我们的标点公式：a, b, and c, 正确答案为C。
2. 逗号：用于分隔插入语(同位语，非限，状语从句等)(公式：S,……, VO 或者 S, who/which……, VO)
真题讲解：新SAT OG-T3-Q41：More than One Way to Dress a Cat
The person chosen for this [Q41] task, digital artist, Eldar Zakirov painted the cats in the style traditionally used by portrait artists, in so doing [Q42] presenting the cats as noble individuals worthy of respect.
Question 41.
A. NO CHANGE (task, digital artist, Eldar Zakirov)
B. task, digital artist, Eldar Zakirov,
C. task digital artist Eldar Zakirov,
D. task, digital artist Eldar Zakirov,
第[Q41] 题中，主语是The person chosen for this task, 谓语动词是painted, 插入语部分是digital artist Eldar Zakirov，按照我们的标点公式：S,……, VO. 正确答案为D。
3. 逗号：用于连接词FANBOYS (FANBOYS-for, and, nor, but, or, yet, so )之前。(公式： SVO, for/and/nor/but/or/yet/so SVO)
例子：He asked the question in a loud voice, but no one answered.
(特别注意：however前后的标点公式：SVO. However, SVO或SVO; however, SVO 或S, however, VO)
4. 逗号，用于状语从句、介词短语或分词短语后
例句：When the bell rang, the teacher dismissed the class.? 或者In the ancient palace, they saw the throne where emperors used to sit.
(注意，如果状语从句在主句之后，逗号通常省略。例如： The teacher dismissed the class when the bell rang.)
