仁爱版七年级英上册Unit1 Topic3 SectionB课件.pptVIP

* * * * * * * * * * * * * * * * * Unit 1 Making New Friends Topic 3 How old are you? Section B a desk a pen a pencil Warming up a book a bus a box a map an apple an orange an egg an eraser 在英语中，a, an和the称为冠词，其中a和an是不定冠词，the是定冠词。不定冠词a和an 都可以表示“一(个、支、张、块……)”的意思。它们在用法上有什么区别呢？请仔细观察下面的例子，然后补全结论部分所缺内容。 A. a “w”, an “s”, an “f” B. an egg, a ruler C. a red apple, an English teacher D. Is that his map? This is my schoolbag. She is in this room. 【结论】 1. 从A、B组例子中可以看出，__ 用在以辅音音素开头的字母或单数名词之前，___ 用在以元音音素开头的字母或单数名词之前。 2. 从C组例子中可以看出, 当名词前有修饰语时，应以______ (名词 / 修饰语)开头的音素决定用a还是用an。 3. 从D组例子中可以看出，若名词前有物主代词his, my等或指示代词this, that 等修饰限定时, ____ (能 / 不能)同时使用冠词。 an a 修饰语 不能 【运用】 请选用a或an完成下列句子或对话。 1. It isn’t __ “u”. It’s ____ “v”. 2. —Is that _____ egg? —Yes, it’s ____ big egg. 3. —What’s this in English? —It’s ____ English book. 4. It’s ____“h”, not ____ “n”. a a an a an an an A: What’s this in English? B: It’s a pen. A: How do you spell it, please? B: P-E-N, pen. A: What’s this in English? B: It’s a book. A: Can you spell it, please? B: B-O-O-K, book . A: What’s this in English? B: It’s a bag. A: How do you spell it, please? B: B-A-G, bag. ---Is this a pencil? ---Yes, it is. A: Is this an orange? B: No, it isn’t. It’s an apple. ---Is that a car? ---No, it isn’t. It’s a bus. Is this / that a / an…? Yes, it is. / No, it isn’t. It’s a / an… Complete the conversations. A: What’s this in English? B: ____ a pencil-box. A: Can you spell it, please? B: _____________________________ It’s P-E-N-C-I-L-B-O-X, pencil-box. A: What’s that in English? B: ____ an apple. A: ___________________? B: A-double P-L-E, apple. It’s How do you spell it A: Is this an eraser? B: Yes, _____. A: Is that a pen? B: No, _______. It is a pencil. it is it isn’t I. Choose the right answer. ___ do you spell it, please? A. What B. How C. Where 2. --- Is that a car? --- No, _____. A. it isn’t B. that is C. that isn’t 3. --- This is _____ eraser. --- _____ her eraser