be动词的用法ppt.ppt

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be动词用法(一般现在时态)
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徐玉娥
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:
我用am,
你用are,
is跟着他(he)她(she)它(it),
单数用is,
复数用are.
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用法演示:
1. I am a girl.
2. You are a teacher.
3. He is my father.
4. She is fine.
5. It is a ruler.
6. His pen is red.
cat is nice.
8. We are friends.
9. They are good boys.
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:
否定句:
在be动词am,is,are后加not,并作相应的缩写为 amn′t, isn′t, aren′t.
一般疑问句:
把be动词 am, is, are提到句首,大写首字母,句末加问号,读为升调↑.
肯定回答用: Yes, 主语+ am /is /are.
否定回答用: No, 主语+amn′t / isn′t /aren′t.
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例句演示:
1. You are a boy.
→You aren′t a boy.
→ Are you a boy?↑
Yes, I am.
(肯定回答不能缩写.)
No, I′m not.
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2. It is a green ruler.
→ It isn′t a green ruler.
→Is it a green ruler?↑
Yes, it is.
No, it isn′t.
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3. I’m a good student.
→I′m not