average 的用法
1. 用作名词,注意以下用法:
表示平均、平均数,是可数名词。如:
The average of 6,8 and 10 is 8. 6,8,10的平均数是8。
An average of 10 students are absent each day. 平均每天有10个学生缺席。
Its said thatthe paper receive an average of nearly 100 articles a day. 据说这个报社平均每天要收到百来篇来稿。
表示普通、标准、平常等(大致相当于一般水平的意思),根据情况可用作可数或不可数名词。如:
Toms work atschool is above average, Jims is below averageand Jacks is up to average. 汤姆的学习成绩属于中上水平,吉姆的学习成绩属中下水平,杰克的学习成绩属中等水平。
表示平均起来、在一般情况下,可用 on average, onan average。如:
On average we receive ten letters eachday. 我们平均每天收到10封信。
He smokes 20 cigarettes a dayon an average. 他平均每天要抽20支烟。
2. 用作形容词,注意以下用法:
表示平均的,通常只能放在名词前作定语,不用作表语,且没有比较等级。如:
What was the average temperature yesterday? 昨天的平均气温是多少?
The average age of the boys in thisclass is fifteen. 这个班男生的平均年龄为15岁。
表示一般的、普通的,可用作定语也可用作表语。如:
Heis just an average student. 他只是个普通的学生。
There wasnothing special about the film---it was only average. 这部电影没什么特别的---只是部普通的电影。
3. 用作动词,通常为及物动词:
He averages two trips a year. 他平均每年旅游两次。
The hotel averages 50 to 100 foreignguests daily. 这家旅馆平均每天接待50 至100 名外国客人。
Thechildren average 10 years of age. 这些小孩平均年龄为10岁。
在现代英语中,类似以下用法的 average 被看作是连系动词 。如:
Our mail averages 20 letters a day. 我们平均每天收到10封信。
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