现在进行时的句子

现在进行时的句子结构主要为：主语 + be 动词（am/is/are）+ 动词的现在分词。

一、肯定句
例如：I am reading a book.（我正在读书。）“I” 是主语，“am reading” 表示正在进行的动作，“a book” 是宾语。
She is singing a song.（她正在唱歌。）“She” 是主语，“is singing” 是正在进行的动作，“a song” 是宾语。
They are playing football.（他们正在踢足球。）“They” 是主语，“are playing” 是正在进行的动作，“football” 是宾语。

二、否定句
在 be 动词后加 not。
例如：I am not watching TV.（我不在看电视。）“I” 是主语，“am not watching” 表示否定的正在进行的动作，“TV” 是宾语。
He is not doing his homework.（他不在做他的作业。）“He” 是主语，“is not doing” 是否定的正在进行的动作，“his homework” 是宾语。

三、一般疑问句
将 be 动词提前。
例如：Are you listening to music?（你正在听音乐吗？）“Are” 提前，“you” 是主语，“listening to music” 是正在进行的动作。
Is she dancing?（她正在跳舞吗？）“Is” 提前，“she” 是主语，“dancing” 是正在进行的动作。

四、特殊疑问句
特殊疑问词 + be 动词 + 主语 + 动词的现在分词？
例如：What are you doing?（你正在做什么？）“What” 是特殊疑问词，“are” 提前，“you” 是主语，“doing” 是正在进行的动作。
Where is he playing basketball?（他正在哪里打篮球？）“Where” 是特殊疑问词，“is” 提前，“he” 是主语，“playing basketball” 是正在进行的动作。

一、单项选择（每题 2 分，共 30 分）

Look! The girls ______ dancing.
A. is B. are C. am D. be
答案：B。解析：“The girls” 是复数，be 动词用 are。Listen! She ______ singing.
A. is B. are C. am D. be
答案：A。解析：“She” 是第三人称单数，be 动词用 is。I ______ reading a book now.
A. am B. is C. are D. be
答案：A。解析：“I” 是第一人称，be 动词用 am。They ______ playing football.
A. is B. are C. am D. be
答案：B。解析：“They” 是复数，be 动词用 are。What ______ you doing?
A. is B. are C. am D. be
答案：B。解析：“you” 是第二人称，be 动词用 are。He ______ writing a letter.
A. is B. are C. am D. be
答案：A。解析：“He” 是第三人称单数，be 动词用 is。We ______ hing a class.
A. is B. are C. am D. be
答案：B。解析：“We” 是复数，be 动词用 are。Look! The boy ______ running.
A. is B. are C. am D. be
答案：A。解析：“The boy” 是第三人称单数，be 动词用 is。Listen! The birds ______ singing.
A. is B. are C. am D. be
答案：B。解析：“The birds” 是复数，be 动词用 are。What ______ they doing?
A. is B. are C. am D. be
答案：B。解析：“They” 是复数，be 动词用 are。She ______ cooking in the kitchen.
A. is B. are C. am D. be
答案：A。解析：“She” 是第三人称单数，be 动词用 is。We ______ watching TV.
A. is B. are C. am D. be
答案：B。解析：“We” 是复数，be 动词用 are。Look! The teacher ______ standing in front of the blackboard.
A. is B. are C. am D. be
答案：A。解析：“The teacher” 是第三人称单数，be 动词用 is。What ______ he doing now?
A. is B. are C. am D. be
答案：A。解析：“He” 是第三人称单数，be 动词用 is。They ______ playing games in the park.
A. is B. are C. am D. be
答案：B。解析：“They” 是复数，be 动词用 are。

二、完形填空（每题 2 分，共 30 分）

It is Sunday morning. The sun is shining. I am in the park. There are many people here. Some are walking. Some are sitting on the benches. Look! A girl 16 flying a kite. Two boys 17 playing basketball. A woman 18 reading a book. A man 19 taking pictures. Some children 20 running and laughing. Everyone is hing a good time.

A. is B. are C. am D. be
答案：A。解析：“A girl” 是第三人称单数，be 动词用 is。A. is B. are C. am D. be
答案：B。解析：“Two boys” 是复数，be 动词用 are。A. is B. are C. am D. be
答案：A。解析：“A woman” 是第三人称单数，be 动词用 is。A. is B. are C. am D. be
答案：A。解析：“A man” 是第三人称单数，be 动词用 is。A. is B. are C. am D. be
答案：B。解析：“Some children” 是复数，be 动词用 are。

三、阅读理解（每题 3 分，共 30 分）

Now it is eight o'clock in the evening. My family are all at home. My father is reading a newspaper. My mother is watching TV. I am doing my homework. My sister is playing with her toys.

What is the time now?
A. Seven o'clock. B. Eight o'clock. C. Nine o'clock. D. Ten o'clock.
答案：B。解析：根据 “Now it is eight o'clock in the evening.” 可知，现在是晚上八点。What is the father doing?
A. Reading a book. B. Reading a newspaper. C. Watching TV. D. Doing his homework.
答案：B。解析：根据 “My father is reading a newspaper.” 可知，父亲正在看报纸。What is the mother doing?
A. Reading a book. B. Reading a newspaper. C. Watching TV. D. Doing her homework.
答案：C。解析：根据 “My mother is watching TV.” 可知，母亲正在看电视。What is the writer doing?
A. Reading a book. B. Reading a newspaper. C. Watching TV. D. Doing homework.
答案：D。解析：根据 “I am doing my homework.” 可知，作者正在做作业。What is the sister doing?
A. Reading a book. B. Reading a newspaper. C. Watching TV. D. Playing with toys.
答案：D。解析：根据 “My sister is playing with her toys.” 可知，妹妹正在玩玩具。

四、句型转换（每题 4 分，共 20 分）

I am reading a book.（改为一般疑问句）
答案：Are you reading a book?
解析：将 be 动词提前。She is singing a song.（改为否定句）
答案：She isn't singing a song.
解析：在 be 动词后加 not。They are playing football.（对画线部分提问）
答案：What are they doing?
解析：用特殊疑问词 what 提问正在做的事情，将 be 动词提前。He is writing a letter.（改为一般疑问句）
答案：Is he writing a letter?
解析：将 be 动词提前。We are hing a class.（改为否定句）
答案：We aren't hing a class.
解析：在 be 动词后加 not。

五、书面表达（10 分）

请以 “My Family Now” 为题，用现在进行时写一篇短文，描述你的家人正在做什么。

My Family Now

It is Sunday afternoon. My family and I are all at home. My father is reading a newspaper in the living room. My mother is cooking in the kitchen. I am doing my homework in my room. My sister is playing with her dolls. We are all busy but happy.

解析：这篇短文用现在进行时描述了作者一家人在周日下午各自正在做的事情，内容较为清晰，语言表达较为准确。