句型转换专题讲解 在小学英语学习中,句型转换这部分是很多小朋友的“薄弱项”,今天我们把句型转换(陈述句变成一般疑问句、变成否定句)系统的总结一下,供同学们参考学习。 一、一般疑问句 1. 什么是一般疑问句? 一般疑问句用于对某一情况提出疑问,通常用yes和no来回答,读时用声调。 2. 变一般疑问句的方法: A:把句子中的be动词提到句首(be动词包括:am is are) 例如:I am a student.→Are you a student? She is a teacher.→Is she a teacher? They are good friends.→ Are they good friends? B:把句子中的情态动词提到句首(情态动词包括can may must will should等) 例如:She can play football.→ Can she play football? I will help you. → Will you help me? C:如果句子中没有be动词和情态动词,就要在句首加上助动词帮助其变成一般疑问句。(助动词包括do和does) 主语是第一、二人称和复数人称时在句首加上Do; 主语是第三人称单数形式时加Does。(加上Does之后,原来句子中的三单形式要还原。) 附: 人称:第一人称:单数:I 复数:we 第二人称:单数:you 复数:you 第三人称:单数:she、he、it以及人名 复数:they 例如: You have a friend. → Do you have a friend? She likes apples. → Does she like apples? Amy does her homework at home. → Does Amy do her homework at home? ◆特别注意: 1. 句点变问号;(★最容易忘记的一步!) 2.句子中的第一人称和第二人称互换; I can help you . → Can you help me? 3.some→ any; I have some apples. →Do you have any apples? 4.动词的三单形式还原问题。 She goes to school on foot. →Does she go to school on foot? 专项练习一 将下列句子改成一般疑问句并回答(肯定/否定)。 1. It is a lovely dog. 2. She is a lovely girl. 3. He is my father. 4. They are Lily’s cousins. 5. We are classmates. 6. I am a doctor. 7 There is a bird in the tree. 8.There are many stars in the sky. 9. They are good friends. 10. I love my parents. 11. We have a pleasant home. 12. We like to climb the mountain. 13. They go to church on Sunday. 14. They walk to school every morning. 15. I can swim. 二、否定句 把一般陈述句变成否定句的方法和一般疑问句变法类似: 1.原句中含有be动词或情态动词的,就直接在be动词或情态动词的后面加not,其他不变。 2.如果没有,就在实意动词的前面加don’t 或doesn’t(如果动词是三单形式要打回原形),其他不变。 3.含有some的要变成any 4.注意区别:这里不需要把be动词、情态动词或助动词提前,也没有人称的转换 专项练习二 将下列句子改成否定句 1. It is a lovely dog. 2. She is a lovely girl. 3. He is my father. 4. They are Lily’s cousins. 5. We are classmates. 6. I am a doctor. 7. There is a bird in the tree. 8.There are many stars in the sky. 9. They are good friends. 10. I love my parents. 11. We have a pleasant home. 12. We like to climb the mountain. 13. They go to church on Sunday. 14. They walk to school every morning. 15. I can swim.
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