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发表于 2016-8-9 18:29:30
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二、不定冠词的用法
1、不定冠词用来表示“一”这个数量，意思和one差不多：
Rome was not built in a day.罗马不是一天建成的。
He will be back in a day or two.他将在一至两天内返回。
A stitch in time saves nine.及时一针顶十针。
这种用法在表示重量、长度、时间等的词组中特别普遍。例如：a pair of socks, a hundred, two yuan a metre, eight hours a day, twice a week, a cup of tea, in a word, one at a time.
2、表示人或事物的某一类
A steel worker makes steel.
A plane is a machine that can fly.
A teacher must love his students.
A knife is a tool for cutting with.
3、表示某一类人或事物中的任何一个。
This is an apple.
His father is a teacher.
This poem was written by a student.
She picked up a magazine and began to read.
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