thereon thereof 等词的意思用法

[[[[就此因此 ]]]]就是这个了

thereof /ðeərɒv/ /ðerɑv/ adverb formal

of or about the thing just mentioned
Please refer to the Regulations and in particular Articles 99 and 100 thereof.

thereon 是比较生僻的 middle English了，给个例子吧。

And when he thought thereon, he wept.
他想起（以往）种种，就哭了。

thereon
ad. 关于那
在那上面, ...之后立即，在其上

例句：
1. Then the king said, Hang him thereon.
王说，把哈曼挂在其上。

2. And when he thought thereon, he wept.
思想起来，就哭了。

3. And thereon spend thy many brittle darts.
把你的利箭耗费在他们身上。

thereof
ad. 关于...,将它,它的，在其中，关于…. 由此

例句：
1. All citizens of the United Kingdom are ruled by the laws thereof.
英联盟的全体公民都受联盟法律的约束。

2. And they could not eat thereof.
所以众人不能吃了。

3. The Employer should bear the cost thereof.
职业病诊断鉴定费用由用人单位承担。