比较具有挑战性的问题

1\A book may be compared to your neighbor,if it be good,it can not last long;if bad,you can not get rid of it too early.这句话怎么分析，为什么it后会是be,而不是is?
2\He who feels the respet which is due to others can not fail to  inspire in them regard for himself,while he who feels and hence manifests,disrespect toward others,especially his inferior,cannot fail to inspire hatred against homself.
3\The more problems you elucidate,the greater will be your achievement.为什么要倒装？

1 虚拟语气3固定结构

the+比较级，the+比较级表示越---就越---

并列句的省略