[Grammar] Having established....

[Andy Lin]

image: https://imgur.com/a/9tkXWxq

This is the first time I see that "ving + ved" form.

Is this rule held in English grammar? Or what keyword I can put for googling it? Thanks.

 

[Rover_KE]

Please quote the sentence containing the phrase you are asking about rather than making us look for it.

 

[Tdol]

It is correct. The caveat has already been established earlier in the text.

 

[Raymott]

Or what keyword I can put for googling it? Thanks.

It's called a perfect participle.
https://www.testden.com/toefl/english-grammar-for-students/Perfect-Participle.html

 

[Andy Lin]

To Rover KE:
Ok, I will do next time.