It's+adj+for sb还是of sb+to do？还原成sb is adj一招判断，kind/clever用of
引言
It's + 形容词 + ______ sb + to do 结构里，到底填 for 还是 of？一句话判断：of 形容"人的品质"，for 形容"对某人来说"。两个句子就能分清。
核心概念：for vs of
```text
for sb：表示"对某人来说"，形容词描述"这件事"
of sb：表示"某人怎么样"，形容词描述"这个人的品质"
It is difficult for me to finish it.
完成它对我来说很难。（difficult 说的是这件事）
It is kind of you to help me.
你帮助我真是太好了。（kind 说的是你）
```
判断技巧：还原成"sb is adj"
```text
of 结构可以还原成"sb is + 形容词"
✓ It is kind of you to help me.
→ You are kind to help me. 你真好，帮我。
能还原，用 of
✗ It is difficult for me to finish it.
→ I am difficult...（不通）
不能还原，用 for
```
常见 of 结构形容词
```text
形容人的品质，用 of：
kind 善良的 nice 好的 clever 聪明的
careful 细心的 brave 勇敢的 polite 有礼貌的
It is nice of you to say so. 你这么说真好。
It is clever of her to ask. 她问得真聪明。
It is brave of him to try. 他敢尝试，真勇敢。
```
常见 for 结构形容词
```text
形容"对某人来说"，用 for：
difficult 难的 easy 容易的 important 重要的
necessary 必要的 interesting 有趣的
It is easy for children to learn songs.
学唱歌对孩子来说很容易。
It is necessary for us to practice.
练习对我们来说是必要的。
```
实战练习
```text
- It is kind ______ you to help me. → of（kind 形容人的品质）
- It is difficult ______ us to pass the exam. → for（difficult 形容这件事）
- It is clever ______ her to solve it. → of（clever 形容她的品质）
- It is important ______ students to read aloud. → for（对学生们来说）
```
总结
```text
of 形容人：kind/nice/clever/brave，可还原 sb is adj
for 形容事：difficult/easy/important，表"对某人来说"
判断方法：能说 sb is adj 用 of，说不通用 for
```
```text
今日小抄：
It is kind of you to help me. 你真好，帮我。
It is difficult for me to finish it. 完成它对我来说很难。
```