Question

！！！急急急！谁擅长SAT语法IS，帮我解释一下下面的问题～谢！

1. To think he can cook better than any other person at the fair, my grandson has the blue ribbons to prove it.
2. Thinking he can cook better than any other person at the fair, my grandson has the blue ribbons to prove it.
3. My grandson thinks he can cook better than any other person at the fair, and he has the blue ribbons to prove it.

为什么3.比1.2.都好？谢谢！！！

Answer 1

1. To think he can cook better than any other person at the fair, my grandson has the blue ribbons to prove it.

1）To think he can cook better than any other person at the fair,
看起来很长，但是构不成句子不，只是个不定式短语，其中的 he can cook better than any other person at the fair 是不定式动词 think 的宾语从句，
放在主句前面的不定式只能做目的状语，意思是“为了考虑他比展销会上其他任何人都烹调得好”。
2）由于上文是目的状语，my grandson has the blue ribbons to prove it 只能是本句的主句，意思是“我祖父有一等奖的蓝绶带去证明这件事”
3）上下文的意思不能贯通，因此这是一个表述晦涩的句子。

2. Thinking he can cook better than any other person at the fair, my grandson has the blue ribbons to prove it.

1）与第一句不同，这里的 Thinking he can cook better than any other person at the fair 是分词短语作状语。
2）句首作状语的分词一般表示愿因、时间、条件, 因此意思是“在考虑他比展销会上其他任何人都烹调得好的时候”或者“因为考虑他比展销会上其他任何人都烹调得好”或者“如果考虑他比展销会上其他任何人都烹调得好”
3）主句与第一句相同，意思没有改变，上下文意思还是不能贯通。

3. My grandson thinks he can cook better than any other person at the fair, and he has the blue ribbons to prove it.

1）本句是并列句：
第一分句：My grandson thinks he can cook better than any other person at the fair, 我祖父认为他比展销会上其他任何人都烹调得好。
第二分句： he has the blue ribbons to prove it. 他有蓝绶带去证明这一点。
2）上下文意思通畅，表述清晰。

Answer 2

太巧了...我前几天才问过别人这题.
比2好是因为Thinking的非谓语修饰语和has blue ribbons to prove it 无关。
给你个例子.
Noticing that the time was not enough for him to concentrate on his business, he decided to leave the school.

就是说这两者必须要有逻辑关系，而B没有。

1.to~表目的。 完全逻辑错误