资源简介

参考答案与解析
一、用 for 或 of 填空
1. for 解析：important 描述事情，用 for
2. of 解析：kind 描述人的品质，用 of
3. for 解析：necessary 描述事情，用 for
4. of 解析：careless 描述人的品质，用 of
5. for 解析：dangerous 描述事情，用 for
6. of 解析：polite 描述人的品质，用 of
7. for 解析：difficult 描述事情，用 for
8. of 解析：generous 描述人的品质，用 of
9. for 解析：good 描述事情，用 for
10. of 解析：silly 描述人的品质，用 of
二、单项选择
1. A 2. B 3. A 4. B 5. B
6. A 7. B 8. C 9. A 10. A
三、句型转换
1. to help
2. of; to
3. To help
4. brave to
5. not to finish
6. They are
7. for; to
8. wrong to
9. Is it
10. not kind
四、完成句子
1. for us to help
2. of; to
3. for; to
4. of; to
5. for us to respect
6. to laugh
7. for; to
8. of; to
9. to learn
10. for us to do
五、短文填空
1. to do
2. for
3. to provide
4. of
5. to spend
6. for
7. to live
8. for
9. to care
10. to learn译林版（2024）八年级下册Unit 6 Sunshine for all
核心语法总结+专项练习题
核心语法总结
一、句型的核心含义与基本结构
1. 句型本质
`it is + 形容词 + (for/of sb.) + to do sth.` 是英语中用来评价“做某事这件事”或“某人做某事的行为”的固定句式。
句中的 `it` 是形式主语，没有实际意义，只是为了避免句子头重脚轻。
真正的主语是后面的动词不定式 `to do sth.`。
2. 三个基础句型
句型 核心含义 例句
It is + adj. + to do sth. 做某事是…… 的（评价事情本身） It is interesting to go fishing. 钓鱼真有趣。
It is + adj. + for sb. + to do sth. 对某人来说，做某事是…… 的（评价事情难度 / 影响） It is necessary for us to learn Lei Feng’s spirit. 对我们来说，学习雷锋精神是必要的。
It is + adj. + of sb. + to do sth. 某人做某事真是…… 的（评价人的品质 / 行为） It is clever of him to solve the problem. 他真聪明，解决了这个问题。
二、句型①：`It is + adj. + to do sth.`
1. 用法说明
形容词用来描述动词不定式（做某事这件事）的特征、性质或客观情况。
常见形容词：`interesting, difficult, easy, dangerous, important, necessary, possible, useful, wonderful, cheap, convenient, exciting, expensive, normal` 等。
2. 例句精讲
It is easy to learn English well.
（学好英语是容易的。）
解析：`easy` 描述的是“学好英语”这件事的难度。
It is dangerous to swim in the river alone.
（独自在河里游泳是危险的。）
解析：`dangerous` 描述的是“独自在河里游泳”这件事的风险。
三、句型②：`It is + adj. + for sb. + to do sth.`
1. 用法说明
在句型①的基础上，用 `for sb.` 引出动作的逻辑主语，说明“这件事对谁来说是……的”。
形容词依然描述事情本身的特征，和 `sb.` 无关。
2. 例句精讲
It is important for us to protect the environment.
（对我们来说，保护环境是重要的。）
解析：`important` 描述的是“保护环境”这件事，`for us` 说明这件事的对象是“我们”。
It is difficult for him to finish the work in an hour.
（对他来说，一小时内完成工作是困难的。）
解析：`difficult` 描述的是“一小时完成工作”这件事，而非“他”的品质。
四、句型③：`It is + adj. + of sb. + to do sth.`
1. 用法说明
形容词用来描述人的品质、性格或行为特征，而非事情本身。
`of sb.` 中的 `sb.` 和形容词之间存在逻辑上的主谓关系，可以改写为 `Sb. is + adj. + to do sth.`。
2. 常见形容词（描述人的品质）
`brave, careless, clever, foolish, generous, good, helpful, honest, kind, nice, polite, silly, stupid, wrong, rude, friendly, thoughtful` 等。
3. 例句精讲
It is kind of you to help me.
（你真好，愿意帮我。）
解析：`kind` 描述的是“you”的品质，可以改写为：`You are kind to help me.`
It is brave of her to save the child from the fire.
（她真勇敢，从火里救出了孩子。）
解析：`brave` 描述的是“her”的品质，可以改写为：`She is brave to save the child from the fire.`
五、核心考点：`for sb.` 和 `of sb.` 的区分（必背）
区分点 for sb. of sb.
形容词描述对象 描述事情 / 动作的特征（难度、重要性、必要性等） 描述人的品质 / 性格（善良、聪明、粗心等）
改写测试法 不能改写为 Sb. is + adj. to do sth. 可以改写为 Sb. is + adj. to do sth.
例句 It is necessary for us to study hard.（不能说：We are necessary...） It is nice of you to help me.（可以说：You are nice to help me.）
专项练习题
一、用 for 或 of 填空（每空1分，共10分）
1. It is important ________ us to care for people with disabilities.
2. It is kind ________ the volunteers to help the homeless.
3. It is necessary ________ the government to build more facilities for the disabled.
4. It is careless ________ him to forget the meeting with the charity workers.
5. It is dangerous ________ children to play near the river alone.
6. It is polite ________ you to speak to the elderly gently.
7. It is difficult ________ her to walk because of her broken leg.
8. It is generous ________ the businessman to donate so much money to the school.
9. It is good ________ us to learn from the people who help others.
10. It is silly ________ him to refuse help when he is in trouble.
二、单项选择（每题2分，共20分）
( ) 1. It is necessary ______ us ______ help people in need.
A. for; to B. of; to C. for; / D. of; /
( ) 2. It is kind ______ you ______ help the old man cross the road.
A. for; to B. of; to C. for; / D. of; /
( ) 3. It is difficult ______ the disabled people ______ live a normal life.
A. for; to B. of; to C. for; / D. of; /
( ) 4. It is brave ______ the volunteers ______ risk their lives to save others.
A. for; to B. of; to C. for; / D. of; /
( ) 5. It is wrong ______ us ______ look down on people with disabilities.
A. for; to B. of; to C. for; / D. of; /
( ) 6. —I think it is meaningful ______ us ______ do voluntary work.
—Yes, we can help many people.
A. for; to B. of; to C. for; / D. of; /
( ) 7. It is careless ______ him ______ leave the door open when he went out.
A. for; to B. of; to C. for; / D. of; /
( ) 8. It is helpful ______ the charity to provide food and clothes ______ the poor.
A. for; to B. of; to C. for; for D. of; for
( ) 9. It is good ______ students ______ learn more about people with intellectual disabilities.
A. for; to B. of; to C. for; / D. of; /
( ) 10. It is important ______ everyone ______ follow the rules when helping others.
A. for; to B. of; to C. for; / D. of; /
三、句型转换（每空1分，共20分）
1. To help people in need is meaningful.（改为同义句）
It is meaningful ________ ________ people in need.
2. You are kind to donate money to the disabled children.（改为同义句）
It is kind ________ you ________ donate money to the disabled children.
3. It is necessary for us to help the elderly.（改为同义句）
________ ________ help the elderly is necessary for us.
4. It is brave of her to save the child from the fire.（改为同义句）
She is ________ ________ save the child from the fire.
5. It is difficult for him to finish the task alone.（改为否定句）
It is difficult for him ________ ________ the task alone.
6. It is helpful of them to give us some advice.（改为同义句）
________ ________ helpful to give us some advice.
7. To learn about charity work is useful for students.（改为同义句）
It is useful ________ students ________ learn about charity work.
8. It is wrong of him to laugh at others.（改为同义句）
He is ________ ________ laugh at others.
9. It is important for us to protect the rights of the disabled.（改为一般疑问句）
________ ________ important for us to protect the rights of the disabled
10. It is kind of you to help me with my study.（改为否定句）
It is ________ ________ of you to help me with my study.
四、完成句子（根据汉语意思完成句子，每空1分，共20分）
1. 对我们来说，帮助有需要的人是有意义的。
It is meaningful ________ ________ ________ people in need.
2. 志愿者们帮助无家可归的人真是太好了。
It is kind ________ the volunteers ________ help the homeless people.
3. 对残疾人来说，独自完成很多事情是困难的。
It is difficult ________ the disabled ________ do many things alone.
4. 他帮助了那么多人，真是勇敢。
It is brave ________ him ________ help so many people.
5. 对我们来说，尊重每一个人是重要的。
It is important ________ ________ ________ everyone.
6. 嘲笑别人是不对的。
It is wrong ________ ________ ________ at others.
7. 学生们参加志愿活动是有帮助的。
It is helpful ________ students ________ take part in voluntary activities.
8. 你能理解残疾人的感受，真是太好了。
It is nice ________ you ________ understand how people with disabilities feel.
9. 学习如何与智障人士沟通是必要的。
It is necessary ________ ________ how to communicate with people with intellectual disabilities.
10. 对我们来说，为社区做些事情是好的。
It is good ________ ________ ________ something for the community.
五、短文填空（用括号内动词的适当形式填空，每空2分，共20分）
Many people think it is meaningful ______1______ (do) voluntary work. It is helpful ______2______ (for/of) volunteers ______3______ (provide) support for people in need. It is kind ______4______ (for/of) them ______5______ (spend) their free time helping others. It is difficult ______6______ (for/of) some people with disabilities ______7______ (live) a happy life. It is important ______8______ (for/of) us ______9______ (care) about them. It is good ______10______ (learn) more about their lives and offer help when we can.

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