#创作挑战赛#
Fractions and Mixed Fractions:
分数和带分数
A fraction is a number that describes a relationship between a part (represented by the numerator) and a whole (represented by the denominator). The number above the line is called the Numerator and the number below the line is called the Denominator.
分数描述的是部分（由分子体现）和整体（由分母体现）之间关系的数字。分数线上的数字称为“分子”，分数线下的数字称为“分母”。
◆ The numerator we use is the cardinal numbers while the denominator we use is the ordinal numbers. When the denominator is 2, we say HALF; When the denominator is 3, we say THIRD; When the denominator is 4, we say QUARTER or FOURTH.
◆ 分子用基数词，分母用序数词。当分母是2时，我们说HALF；当分母是3时，我们说THIRD；当分母是4时，我们说QUARTER或FOURTH。
Subject-Verb Agreement with the Fraction or Percentage:
分数和百分数作主语时的主谓一致：
◆ Often, if the word that follows the fraction or percentage is singular, you'll use a singular verb. If the word following the fraction is plural, use a plural verb.
◆ 通常情况下，分数或百分数后面所接的名词为单数或不可数名词，在句中作主语时，谓语动词则用单数形式。如果，分数或百分数后面所接的名词为复数名词，在句中作主语时，谓语动词用复数形式。
★ Approximately three quarters of the Earth is covered with water.
★ 地球表面约四分之三的面积都被水覆盖。
★ Two thirds of the students in my class are science majors.
★ 我班上三分之二的学生是理科专业。
★ Only 3o% of the work was done yesterday.
★ 昨天只完成了百分之三十的工作。
★ Sadly, 13% of poor households in the world have no access to electricity.
★ 遗憾的是，世界上有13%的贫困家庭没有通电。
★ About 71% of the Earth’s surface is covered in water.
★ 地球表面约71%的面积都被水覆盖。
★ Only 1.2% of all the fresh water on Earth is drinkable.
★ 地球上所有的淡水可直接饮用的只有1.2%。
★ 50% of the mistakes in your essay have to do with punctuation.
★ 你的论文50%的错误都与标点符号有关。
★ About 2% of the population has autism.
About 2% of people have autism.
★ 约2%的人有自闭症。
◆ If the fraction or percentage comes before a collective noun, follow the rules of the collective nouns. Remember that collective nouns can take a singular or plural verb depending on whether the noun is acting as a whole group or whether the members of the group are acting as individuals.
◆ 如果分数或百分数修饰的是集体名词，遵循集体名词主谓一致原则。集合名词在句中表整体概念，谓语动词应用单数。如表示个体或成员，谓语动词则用复数形式。
◆ Half the class has signed up for the field trip.Fifty percent of the class has signed up for the field trip.
the whole class VS the individual students
★ Half the class have signed up for the field trip.Fifty percent of the class have signed up for the field trip.
★ 半个班级已经报名参加实地考察。
★ 班上50%的同学已经报名参加实地考察。
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