Worth,worthy, worthwhile这三个词怎么用？

Worth
形式1：be worth + 动名词 (不加不定式)
① 动名词一定是主动形式
② 动词名中的动词一定是及物动词，主语为此动词的感官对象。
The experiment is worth trying. (not being tried) 这个实验值得去尝试。

形式2： be worth可加money, price, time等名词
A nuclear submarine is worth more than a billion dollars. 这艘核潜艇价值可达十亿多美元。

Worthwhile
形式1： 动名词／不定式＋be worthwhile
Explaining a job fully to a new employee is worthwhile.
To explain a job fully to a new employee is worthwhile.
给新雇员详细说明工作的要求是值得的。
形式 2： It is + worthwhile + 动名词/不定式
For example:
It is worthwhile to explain a job fully to a new employee.
It is worthwhile explaining a job fully to a new employee.
形式3： It is worth one’s while + 不定式 （不加动名词）
It is worth your while to explain a job fully to a new employee.

Worthy
形式 1： be worthy of 名词/动名词的被动形式（不加不定式）
This issue is worthy of careful study. 这一问题值得仔细研究。
This issue is worthy of being studied carefully. (passive gerund)
形式 2：