This book will help (to) improve your English.
美国人常将句中的to可省略。
You will be helped to improve your English.
I cannot help thinking so.
I cannot help thinking so.
第一句比第二句用法普遍。
I cannot help but think so.
His help is a young man.
他的帮佣是个年轻的男人。
All his help are young men.
他全部的帮佣都是年轻的男人。