动词的现在分词：

规则

(1)一般在动词后加 ing

do-doing

stay-staying

(2)以不发音的字母e结尾的动词先去e，再加ing

dance-dancing

ride-riding

write-writing

(3)以重读闭音节结尾的，先双写最后一个辅音字母，再加ing

sit-sitting

run-running

swim-swimming

begin-beginning

(4)以ie结尾的单词，改ie为y，再再加ing

lie-lying

现在进行时的陈述句和一般疑问句:

知识要点：

1.肯定陈述句：主语+ be + 现在分词+……

例如：

I am running.

She is working.

You are singing.

2.否定陈述句：主语+ be + not + 现在分词+……

例如：

I am not running.

She isn't working.

You are not singing.

3. 一般疑问句结构：Be + 主语 + 现在分词 + ……

例如：

---Are you singing?

---Yes, I am. / No, I am not.

---Is he listening to music?

---Yes, he is. / No, he isn't.

现在进行时的特殊疑问句:

知识要点：

现在进行时特殊疑问句的结构：疑问词+ be( am, is, are)+主语+现在分词+…?

例如：

--- What are you doing?

--- I am doing my homework.

--- Where are you doing your homework?

--- I am doing it at home.

--- Whose father is watering trees?

--- Lily's father is watering trees.

注意：解题时要抓住主要涉及的内容来使用不同的疑问词，回答特殊疑问句时要根据不同的人或物而选择不同的疑问代词回答

例如：

--- What's your brother doing?

--- He is sleeping.

--- What's your brother?

--- He is a teacher.

每天一练

一、单项选择。

( ) 1. ---Is your mother ______ the room?

---Yes, she is.

A. cleans B. cleaning C. cleaned

( ) 2. ______ your classmates playing games?

A. Am B. Is C. Are

( ) 3. My sister______ her homework now.

A. doing B. is doing C. is do

( ) 4. He______ climbing mountains.

A. am not B. isn't C. aren't

( ) 5. What______ you______ now?

A. am, doing B. is, doing C. are, doing

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