SAT文法知识系列栏目说明：每期分享3-5个文法知识点，帮助大家更好地备考SAT。
一、标点符号
1. 含义：
句中的标点符号使用要规范。
2. 类型：
（1）句号和引号符号
3. 用法
句号
（1）连接两个独立句。
①独立句：包含简单句（有一套完成的主语、谓语和宾语的句子）和主从句（有一个主句+一个或多个从句的句子）。
例句1: Tom is a student. He studies SAT.
解析：本句中两个独立的简单句，与句号搭配。
例句2: Tom is a student. He studies SAT, which is accepted by most US universities.
解析：本句的句号连接了一个简单句和一个主从句，其中从句由which引导。
（2）句号与分号的区别
①助动词在主语前，用问号。
1)助动词：can, could, may, might, shall, should, will, would, am, is, are, was, were
例句3: Can you keep the door open?
解析：本句的助动词can在主语you前面，所以用问号。
②助动词在主语后，用句号。
例句4: You can keep the door open.
解析：本句的助动词can在主语you后面，所以用句号。
引号
（1）引用句子，前与逗号搭配。
例句4: He asked, “What went wrong?”
解析：引用的是问句what went wrong，所以前面与逗号搭配。
（2）引用短语，前无需加逗号。
例句5: Defining the meaning of “happiness” is a perplexing proposition.
解析：本句中引用的是单词happiness，所以无需加逗号。
题目检测
题目检测1
The Qatar team lost the World Cup opening game. Their players were sad after that game.
A. NO CHANGE
B. Cup opening game, 
C. ,Cup opening game, 
D. Cup opening game: 
解析：通过句号看出是标点符号的考点，根据“句号连接两个独立句”的原则，排除B和C项；再根据句意判断前后句是并列关系，所以不是解释关系，所以排除含有冒号的D项，所以选A。
题目检测2
Peter Watson is a talented artist, he is making sketches for his next painting.
A. NO CHANGE
B. ; he making 
C. . He is making 
D. , he is making, 
解析：通过句号看出是标点符号的考点，根据“句号连接两个独立句”的原则，排除A和D项；而B项虽然用了分号，但第二句用了非谓语动词making，所以是段意，而根据“分号后不加短语”的原则，排除B项，所以选C。
题目检测3
China, one of the fast growing countries in the world, achieved their goals one by one because they followed their 5-year plans. Thus, this is the reason that the developing countries wants to learn their successful ways from them?
A. NO CHANGE
B. ways from them;
C. ways from them. 
D. ways from them,
解析：通过句号看出是标点符号的考点，根据“助动词在主语后，用句号”的原则，排除A/B/D项，所以选C。
题目检测4
After lost the 1/8 game of FIFA World Cup 2022, players of South Korea asked, “what’s our problem?” 
A. NO CHANGE
B. asked; “what’s 
C. asked. “what’s
D. asked: “what’s
解析：通过引号看出是标点符号的考点，根据“引用句子，前与逗号搭配”的原则，“what’s our problem?”引用的是句子，所以排除B/C/D项，所以选A。