問：如何使用a/an？

答：如下

Mr.blake:Good moring.

Students:Good moring ,Mr.blake.

Mr.blake:This is miss Sophie Dupont.sophie is a new student.she's French.

Mr.blake:sophie.this is Hans,he is German.

Hans :Nice to meet you.

Mr.blank:and this is Naoko.she's japanese.

NaoKo:Nice to meet you.

Mr.blank:and this is Chang-woo,He's korean.

Chang-woo:Nice to meet you.

Mr.blank:and this is Luming.He's Chiness.

Luming:Nice to meet you.

Mr.blank:and this is xiaohui.she's chinese,too.

xiaohui:Nice to meet you.

This is every body：這是大家

語法：冠詞a/an，一個，放在名詞之前

a+n.（首音標是輔音音標） an+n.（首音標是元音音標）

eg：a pen/an hour/an egg