关于英语改写句子的练习，以下是综合多个版本整理的改写类型及示例，供参考：

一、一般疑问句改写

原句：

There is a new computer in my study.

改写：Is there a new computer in my study？

原句：

There are some books in the box.

改写：Are there any books in the box？

原句：

Is there a kiwifruit in the picture？

改写：Are there any kiwis in the picture？

原句：

There are some teachers in the classroom.

改写：Are there any teachers in the classroom？

二、否定句改写

原句：

There is a computer in my study.

改写：There is not a computer in my study. [或 There is no computer in my study.]

原句：

There are some books in the box.

改写：There are not any books in the box. [或 There are no books in the box.]

原句：

There is a kiwifruit in the picture.

改写：There is not a kiwifruit in the picture. [或 There is no kiwi in the picture.]

原句：

There are some teachers in the classroom.

改写：There are not any teachers in the classroom. [或 There are no teachers in the classroom.]

三、特殊句型改写

存在句改为一般疑问句

- 原句：There is a pen on the desk.

改写：

Is there a pen on the desk？

现在分词短语作后置定语

- 原句：The boy sitting on the bench is my friend.

改写：

My friend who is sitting on the bench is the boy.

被动语态改写为主动语态

- 原句：The cake was eaten by Tom.

改写：

Tom ate the cake.

四、同义句改写

原句：

I have a computer in my study.

改写：There is a computer in my study. [或 I possess a computer in my study.]

原句：

This is a big house.

改写：That is a large house. [或 This is a huge house.]

五、其他常见改写类型

对时间/地点提问：

原句：We watch dragon boat races during the Dragon Boat Festival.

改写：When do you watch dragon boat races？ [或 Where do you watch dragon boat races？]

缩写与省略：

原句：Tom does his homework at six every day.

改写：Tom does homework at 6 PM. [或 Tom does it at 6 PM.]

提示：改写时需注意主谓一致（如复数主语用are，单数主语用is）和冠词使用（如存在句中通常使用there is/are）。建议结合具体语法点进行针对性练习。