小学英语中的句型转换是学习英语语法的重要环节，主要涉及否定句、一般疑问句、特殊疑问句以及同义句的变换。以下是对划线部分提问的一些常见句型和技巧：
1. 改为否定句：
- This is a Japanese car. → This is not a Japanese car.
- It's a pear. → It's not a pear.
2. 改为一般疑问句：
- That's my cup. → Is that your cup?
- You can sit down. → Can you sit down?
3. 对划线部分提问（特殊疑问句）：
- It is a nice jeep. → What is it?
- Wei Hua lives in Row Three. → Which row does Wei Hua live in?
- Li Lei is twelve. → How old is Li Lei?
4. 作否认答复：
- Is that a computer? → No, it isn't.
- Is that a cake? → No, it isn't.
5. 连词成句：
- What is one and three? → 这句话是询问1加3等于多少，答案是"What is one and three? Four."
6. 同义句转换：
- That's OK. → That's all right.
- These are Chinese books. → These are not Chinese books.
- They are children. → He is a child.
7. 句型变化：
- The cat is here. → Where is the cat?
- It's a pencil-box. → These are pencil-boxes.
- Those are hills. → What are those?
8. 用形容词或副词的反义词改写句子：
- That isn't a new coat. → That is an old coat.
- My bike is here. → My bike is not there.
9. 并列结构：
- Lily is in Row Two. Lucy is in Row Two, too. → Lily and Lucy are in the same row.
- Tom and Billy are twins. → Tom is Billy's twin brother.
10. 全部学生相关：
- Every student is at school today. → The students are all at school today.
11. 选择疑问句：
- Jim Green is English. → Is Jim Green English or American?
通过这些练习，学生可以更好地掌握英语句型的转换规则，提高在实际对话中灵活运用英语的能力。记住，理解和应用这些基本句型是小学英语学习的关键部分，对于后续的英语学习有着重要的铺垫作用。
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