SAT备考知识点推荐： SAT文法知识点第23期

一、标点符号

1. 含义：

句中的标点符号使用要规范。

2. 类型：

(1) 所有格符号

3. 用法

(1) 表示名词和不定代词的所有格。冠词和一般名词复数加 ’s。

例句1: The boy’s mother is our school teacher.

解析：本句中的boy前面有冠词the为单数名词，所以加’s。

例句2: A civil engineer’s skills are needed to operate this machinery.

解析：本句中的civil engineer前面有冠词a为单数名词，所以加’s。

例句3: People’s opinions were heard by the president of this party.

解析：本句中的people为一般名词复数，所以加’s。

例句4: Children’s laughter filled the corridor.

解析：本句中的children为一般名词复数，所以加’s。

(2) 复数名词加s’。

例句5: Birds’ immigration normally occurs in winter.

解析：本句中的birds为复数名词，所以加s’。

(3) 人名以s结尾的加s’。

例句6: Douglas’s crimes were investigated by two detectives.

解析：本句中的Douglas以s结尾，所以加s’。

(4) 修饰语前不加所有格。

例句7: There is a boy’s interested in studying a science course.(错误)

解析：interested in studying a science course作为boy的修饰语，前面需要是名词形式，而不能加所有格，所以改法如下：

例句8: There is a boy interested in studying a science course.

题目检测

题目检测 1

An aerospace engineers skills’ are applicable to areas beyond space exploration.

A. NO CHANGE

B. engineer’s skills

C. engineers’ skills

D. engineers skill’s

解析：通过所有格看出是标点符号的考点，根据“冠词和一般名词复数加 ’s”的原则，an aerospace engineer应该是单数，后加’s，所以排除A/C/D，所以选B。

题目检测 2

The question now is whether training more hospitalists will really improve patients quality of care.

A. NO CHANGE

B. patients's quality

C. patient's quality

D. patients' quality

解析：通过所有格看出是标点符号的考点，根据“复数名词加s’”的原则，patients为复数名词，所以后面直接加s’;而如A项不加所有格、B项复数再加’s和C项单数加’s，均为错误选项故排除A/B/C，所以选D。

题目检测 3

The Stevens’s house had a family reunion where they saw some relatives they hadn't seen for 20 years.

A. NO CHANGE

B. The Steven’s house

C. The Stevens house

D. The Stevens’ house

解析：通过所有格看出是标点符号的考点，根据“人名以s结尾的加s’”的原则，Stevens为人名，所以后面直接加’s;而如C 项不加所有格和B、D拆开Stevens为Steven的形式，均为错误选项故排除B/C/D，所以选A。

题目检测 4

The student union depends on group leaders’ to keep it running on schedule.

A. NO CHANGE

B. leader’s

C. leaders

D. leaders’s

解析：通过所有格看出是标点符号的考点，根据“修饰语前不加所有格”的原则，to keep it running on schedule修饰leaders，所以leaders不加所有格形式，故排除A/B/D，所以选C。