不定冠词的基本用法
①.表示“一”的含义。
Give me a pen please。
We go shopping twice a week。
②.泛指某个人或东西。
Yesterday we visited an English secondary school 。
She picked up a magazine and began to read 。
③.表示一类人或东西。
He works as a language teacher in that university 。
As a writer, he is successful。
Even a child can answer this question。
可数名词单数出现,泛指用不定冠词,特指用定冠词。一个可数名词的单数不能自己单独出现。
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