为什么这些动词后面要加ing?(英语)1.I'm visiting my friends.2.He isn't writing a postcard.3.Is she enjoying her visit?4.Are they buying postcards?这些句子是现在进行时吗?如果是,从哪里看得出来?如果不是,是根据什

为什么这些动词后面要加ing?(英语)1.I'm visiting my friends.2.He isn't writing a postcard.3.Is she enjoying her visit?4.Are they buying postcards?这些句子是现在进行时吗?如果是,从哪里看得出来?如果不是,是根据什
为什么这些动词后面要加ing?(英语)
1.I'm visiting my friends.
2.He isn't writing a postcard.
3.Is she enjoying her visit?
4.Are they buying postcards?
这些句子是现在进行时吗?
如果是,从哪里看得出来?
如果不是,是根据什么规则在动词后面加ing?
这些句子有否定句、疑问句,动词也加了ing,否定句和疑问句时动词要不要保持原形?
还有哪些情况下动词要变ing形式的?

为什么这些动词后面要加ing?(英语)1.I'm visiting my friends.2.He isn't writing a postcard.3.Is she enjoying her visit?4.Are they buying postcards?这些句子是现在进行时吗?如果是,从哪里看得出来?如果不是,是根据什
动名词形式也要加（动名词即是具有名词性质的动词）
eg：Making the bed is very simple!
这里的“making"不是做（动词）,而是一个名词
还有现在进行时也要加"ing",
一般情况下系动词（am is are)不能和动词同时出现,
要在动词后加“ing”
.I'm visiting my friends.
是将来时visit是一个瞬间动词作一般现在时没“ing”形式.
He isn't writing a postcard是现在进行时
意为：他没在写明信片.
.Is she enjoying her visit?
一般情况下系动词（am is are)不能和动词同时出现,
要在动词后加“ing”
.Are they buying postcards?
是现在进行时意味：他们正在买明信片吗?

be doing 就是进行时态

be动词后加ing形式 表现在进行时 介词后也加动词ing形式

1.是的
2.be后加动词ing形式就是现在进行时
3.be动词后面加not,动词用ing形式,变的只是be动词
4.还有一般将来时,be+doing也可以表示将来

问：
1.I'm visiting my friends.
2.He isn't writing a postcard.
3.Is she enjoying her visit?
4.Are they buying postcards?
问题一：这些句子是现在进行时吗?
问题二：如果是,从哪里看得出来?
如果不是,是根据什么规...

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问：
1.I'm visiting my friends.
2.He isn't writing a postcard.
3.Is she enjoying her visit?
4.Are they buying postcards?
问题一：这些句子是现在进行时吗?
问题二：如果是,从哪里看得出来?
如果不是,是根据什么规则在动词后面加ing?
问题三：这些句子有否定句、疑问句，动词也加了ing，否定句和疑问句时动词要不要保持原形？
问题四：还有哪些情况下动词要变ing形式的？
答：
动名词形式也要加（动名词即是具有名词性质的动词）
eg：Making the bed is very simple!
这里的“making"不是做（动词），而是一个名词
还有现在进行时也要加"ing"，
一般情况下系动词（am is are)不能和动词同时出现，
要在动词后加“ing”

.I'm visiting my friends.
是将来时visit是一个瞬间动词作一般现在时没“ing”形式。
He isn't writing a postcard是现在进行时
意为：他没在写明信片。

.Is she enjoying her visit?
一般情况下系动词（am is are)不能和动词同时出现，
要在动词后加“ing”
.Are they buying postcards?
是现在进行时意味：他们正在买明信片吗？

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[外貌]现在进行时的构成：be(am / is / are)+现在分词(V-ing)
这里需要同学们掌握现在分词的构成规则：
1.大多数动词直接在词尾加-ing，例如：go-going, work-working, study-studying, look-looking等。
2.以不发音的e字母结尾的动词，需去掉e再加-ing，例如：make-making, ...

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[外貌]现在进行时的构成：be(am / is / are)+现在分词(V-ing)
这里需要同学们掌握现在分词的构成规则：
1.大多数动词直接在词尾加-ing，例如：go-going, work-working, study-studying, look-looking等。
2.以不发音的e字母结尾的动词，需去掉e再加-ing，例如：make-making, write-writing, skate-skating等。
3.以重读闭音节结尾，末尾只有一个辅音字母的动词，要双写这一辅音字母，再加-ing。例如：
run-running, swim-swimming等。
[特征]现在进行时的判定方法
1.若句首用了提示词listen或look，则其后的句子常用现在进行时。例如：
Listen! Who is singing in the classroom?
2.当句首或句末用了副词now时，此句子常用现在进行时。例如：
Now the students are writing the new words.
3.根据具体的语境判定用现在进行时。例如：
Don't talk, your brother is doing his homework.
-What's he doing?
-He is flying a kite.
[特殊]come, go, leave等短暂性动词常用现在进行时表示将要发生的动作。例如：
I'm coming.我就来。
We're going to Shanghai this afternoon.今天下午我们将要去上海。
现在进行时课堂练习
用括号内所给动词的适当形式填空。
1. Look! The children________(swim) in the river.
2. Now we________(want) to play basketball.
3. -________you________(draw) a picture?
-No, I'm not. I________(write) a letter.
4． What are you _________(do) now? I ___________(eat) bread.
5. It’s nine o’clock. My father_______________(work) in the office.
6. Look, the boy____________(put) the rubbish into the bin.
7. __________he__________(clean) the classroom? No, he isn’t.
He____________(play).
8. Where is Mak? He___________(run) on the grass.
9. Listen, who____________(sing) in the music room? Oh,
Mary_____________(sing) there.
将下列句子改成现在进行时
1. Tom can speak Chinese.
2. We have four lessons.
3. I watch TV every day.
4. She works in a hospital.
5. Do you like this book?
6. Kitty and Ben have lunch at about twelve.
7. His father can help them.
8. Danny, open the door.
9. They watch TV in the evening.
现在进行时课后练习
一、选择填空：
( )1. Look! LiPing and Li Ying ________ basketball now.
A. play B. plays C. are playing
( )2. Can I______ this book?
A. have B. has C. having
( )3. I to music at 7:00 this morning.
A. listen B. listening C. listens
( )4. What ______ that in the box? A shirt.
A. am B. is C. are D. be
( )5. Can I TV? Sure.
A. watching B. watch C. see
( )6、She like swimming.
A. doesn't B. don't C. isn't.
( )7. Here the money.
A. are B. is C. am
( )8. There _______ a table and two chairs in Jenny’s room.
A. am B. is C. are

二、用动词的适当形式填空。
1、Tom (swim) in the river now.
2、It’s eight o’clock now. The boys (watch) TV.
3、She usually (do) her homework in the evening.
4、Tom and Tony can’t (swim).
5、What does your father ______ (do)? He’s a worker.
6、Look! Jim and Tom (run) there.
三、写出下列动词的现在分词。
Model: clean cleaning
1) watch __________ 2) wash __________
3) cook_________ 4) use __________
5) lie _________ 6) carry _________

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ing代表正在进行时