1、Topic 3 What class are you in? Section B,Unit 1,T: Whats this in English? S: Its an apple.,T: Whats this in English? S: Its an egg.,a car,a pencil,a pen,a book,a map,a blackboard,an apple,an orange,an egg,an eraser,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 appl
2、e,apple,pencil,book,desk,a,a,a,an,eraser,pen,toy,map,a,a,a,an,1b Complete the conversations and then practice with your partner.,A: Excuse me , whats _ in English? B: Its _ pencil. A: How do you spell it? B: _, pencil. A: Thank you . B: _ _.,a,P-E-N-C-I-L,Youre welcome,this,A: Excuse me, whats _ in
3、English? B: Its _ apple. A: _ _ _ _, please? B: Yes. A-double P-L-E, apple. A: _. B: Thats OK.,an,Can you spell it,that,Thanks,Whats this in English? Its a / an How do you spell it? ,A: Is this an eraser? B: Yes, _. A: Thank you.,A: Is that a pen? B: No, _. It is a pencil.,it is,it isnt,A: Is that a
4、 desk? B: Yes, it is.,A: Is this an orange? B: No, it isnt. Its an apple.,A: Whats this? B: Is it a/an ?,Example: Class: Whats this in English? Jane: Is it a / an ? Class: Yes, it is. /No, it isnt. Its a / an ,Play this game after the example. Guess the objects by touching them.,Class activity,Sum up,Patterns : Whats this / that in English? Its a / an How do you spell it ? Is this a /an ? Yes, it is. / No, it isnt. 2. New words: a/an, spell, can, please, double etc.,（1）总结：在学过的名词中，哪些前面加a，哪些前面加an。 （2）参考1a，自编两则对话，写在作业本上。,Homework,
