语法专项整理：不定冠词（a/an）
a/an 放在名词前面，表示一个、一只、一条、一头…..等。
(1)一般名词，在前面加a. 比如：a book, a computer, a dog
(2)元音字母(a,e,i,o,u)开头的名词，一般前面加an. 比如: an egg , an orange, an
English book. 少数除外：an hour, a university(以元音发音为准)
a用在以辅音音素开头的单词前，an用在以元音音素开头的单词前。
不定冠词（a/an）练习
一、请在横线上填上a或an：
1._________ dog
2._________ bee
3.________ student
4._________ egg
5.________ elephant
6.__________ bag
7.________apple
8._________cat
9.________boy 10.________ pen 11. ________ pencil 12.________ruler 13________happy 14.________umbrella 15.________orange 16.________ eraser 17.________ green apple 18.________ long umbrella 19.________ book 20.________ old bike 21. ________dog
22. ________ orange book 23. ________red color 24. ________computer 25. ________hat 26. ________orange hat 27. ________ blue chair 28. ________ English book 29. ________ bird 30. ________ doctor 31. ________ driver 32. ________ teacher 33. ________nurse 34. ________eye 35. ________present 36. ________ window 37. ________ panda 38. ________hand
语法专项整理：数词
