I won't lent my book to whom doesn't treasure it.
问题描述：
I won't lent my book to whom doesn't treasure it.
whom作宾语是指在主句中还是在从句中
答
1.此句造得不对,正确句子应该是：
I won't lend my book to whoever doesn't treasure it.
2.此类句子要求连词既能引导表人的一个宾语从句（做介词to的宾语）,又必须在此从句中充当一定的成分（做doesn't treasure it的主语）.
此类连词只能是whatever/whoever/whomever/whichever.
3.此句须用whoever,不能用whomever.
因为它并不是单独做to的宾语,而是引导一个从句一并做宾语；
但是它必须在该从句中充当主语,所以必须用whoever.
4.此类题目中的whoever=anybody who,可更好有助于楼主理
I won't lend my book to whoever doesn't treasure it.
=I won't lend my book to anybody who doesn't treasure it.
当然,此时who doesn't treasure it就是一个定语从句,修饰anybody；而anybody则单独做介词to的宾语.
此种变化也很清楚地表明了为什么用whoever而不能用whomever.