Unit1 Topic3 How old are you? 第2课时 课件（仁爱科普版七年级上册）

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Unit1 Topic3 How old are you
a desk
a pen
a pencil
a book
a bus
a box
a map
an apple
an orange
an egg
an eraser
a, an和the称为冠词，a和an是不定冠词，the是定冠词。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 an egg.
A: How do you spell it, please
B: E-G-G, egg.
---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.
A. a; It’s B. an; Its C. an; It’s
B
A
C
4. It’s my ruler. (改为否定句)
It ____ my _____.
5. What’s this _________ (用英语)？
It’s _______ (一支铅笔)。
isn’t
ruler
in English
a pencil
II. 请选用a / an完成下列句子。
1. She is ___ English girl.
2. It is __ good apple.
3. It’s __ “m”, not __ “w”.
4. That is __ old car.
5. This is my mom. She is __ teacher.
an
a
an
a
an
a
III. 请根据所给情景用适当的词语完
成下列句子或对话。
1. —Excuse me, is this your toy
—Yes, __ is.
2. —What’s that in English
— ___ a ruler.
it
It’s
3. — ____ you ____ it, please
—Yes, I can.
4. — __ that an egg
—Yes, __ is.
5. This ____ a car, but it’s a bus.
Can
spell
Is
it
isn’t