動詞的現在分詞：

規則

(1)一般在動詞后加 ing

do-doing

stay-staying

(2)以不發音的字母e結尾的動詞先去e，再加ing

dance-dancing

ride-riding

write-writing

(3)以重讀閉音節結尾的，先雙寫最后一個輔音字母，再加ing

sit-sitting

run-running

swim-swimming

begin-beginning

(4)以ie結尾的單詞，改ie為y，再再加ing

lie-lying

現在進行時的陳述句和一般疑問句:

知識要點：

1.肯定陳述句：主語+ be + 現在分詞+……

例如：

I am running.

She is working.

You are singing.

2.否定陳述句：主語+ be + not + 現在分詞+……

例如：

I am not running.

She isn't working.

You are not singing.

3. 一般疑問句結構：Be + 主語 + 現在分詞 + ……

例如：

---Are you singing?

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

---Is he listening to music?

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

現在進行時的特殊疑問句:

知識要點：

現在進行時特殊疑問句的結構：疑問詞+ be( am, is, are)+主語+現在分詞+…?

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：解題時要抓住主要涉及的內容來使用不同的疑問詞，回答特殊疑問句時要根據不同的人或物而選擇不同的疑問代詞回答

例如：

--- What's your brother doing?

--- He is sleeping.

--- What's your brother?

--- He is a teacher.

每天一練

一、單項選擇。

( ) 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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