Topic 3 What class are you in? Section BUnit 1A: Excuse me, whats this?B: Its a book.A: Whats that in English?B: Its an egg.a blackboarda toyA和和AN的區(qū)別的區(qū)別1. a 用在以輔音音素開頭的單詞前。用在以輔音音素開頭的單詞前。 例如：例如：a book; a desk2. an 用在以元音音素開頭的單詞前。用在以元音音素開頭的單詞前。 例如：例如：an egg; an appleapplerulerpencilbookdeskaaaaaneraserpentoymapaaaan2aLook, listen and sayIs that a toy, too?An eraser? Wow!No, its an eraser.No, it isnt. Its a toy.Is this a telephone?Whats this/that in English?Its a / an Can you spell it?Yes.How do you spell it?Thank you. / Thats OK. /Thanks.Youre welcome.Section B1aLook, listen and sayIts a map.Excuse me, whats this in English?Whats that in English, Maria?Its an eraser.1b Complete the conversations and then practice with your partner.A: Excuse me , whats _ in English?B: _ _ pencil.A: How do you spell it?B: _, _.A: Thank you .B: _ _.Its aP-E-N-C-I-LpencilYoure welcomethisA: _ _, whats that in English?B: _ _ apple.A: _ _ _ _ , _ _ _ _ _ ?B: A-double P-L-E, apple.A: _.B: Youre welcome.Its anCan you spell it pleaseExcuse meThanksExample:Whats this in English?Is it a / an ?Yes, it is. /No, it isnt. Its a / an Touch and guess what it is with eyes covered. Use sentences of identifying objects.Sum up1. 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）總結(jié)：在學(xué)過的名詞中，哪些前面 加a，哪些前面加an。（2）參考1a，自編兩則對(duì)話，寫在 作業(yè)本上。