Transcript 微课件

主
讲: 金 小 玲
学习对象 ;七年级学生
一、什么是助动词
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在英语中,助动词本身没有意义,只是帮
助实义动词完成某些语法功能,如构成否
定句、疑问句、简略答语等。
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本节课我们主要探究do的基本用法。
二. 助动词do的基本用法
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原形 do
现在时第三人称单数 does
过去式 did (本节课不作讲解)
1. 原形
肯定式:
do
否定式:
do not
缩略否定式: don’t
用法:do用在第一人称单复数、第二人称单复数和第三人
称复数做主语,且时态为一般现在时的句子中。
举例(for example):
I like apples.
否定句:
I don’t like apples.
一般疑问句及回答:
Do you like apples?
Yes, I do./ No, I don’t.
特殊疑问句:
What fruit do you like?
2. 现在时第三人称单数
肯定式:
does
否定式:
does not
缩略否定式: doesn’t
用法:does用在第三人称单数做主语,且时态为一
般现在时的句子中。
注意:当does出现时,句子中用动词原形。
举例(for example):
She likes bananas.
否定句:
She doesn’t like bananas.
一般疑问句及回答:
Does she like bananas?
Yes, she does./ No, she doesn’t.
特殊疑问句:
What fruit does she like?
EXERCISES
1. What color (
A. do
B. does C. are
2. What food (
A. do
) you like best?
) she like best?
B. does
C. is
3. Do you have a soccer ball?
肯定回答:(
)否定回答:(
4. She has two brothers.(变为一般疑问句并做肯定回答)
(
)
5. They have a football.(对划线部分提问)
(
)
)
ANSWERS:
1.A 2. B
3. Yes, I do. No, I don’t.
4. Does she have two brothers?
Yes, she does.
5. What do they have?