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It has forests, but no trees;
It has rivers , but no water.
What is it ?
Can you guess it ?
It has cities , but no house;
It has forests, but no trees;
It has rivers , but no water.
What is it ?
Can you guess it ?
an apple
What’s this in English?
It’s …
an eraser
a book
a map
a和an的区别
1. a 用在以辅音音素开头的单词前。 例如：a book， a desk
2. an 用在以元音音素开头的单词前。 例如：an egg， an apple
a/an被称作不定冠词，用在单数可数名词前，表达某一个人或事物中的一个，相当于汉语的“一”， 但不强调数目概念。
a/an用法的区别：
a car
a pencil
a pen
a book
a map
an apple
an apple
an orange
an egg
an eraser