变独立主格，because his homework has been finished？

Question

Because his homework has been finished , he can play with us. 想要把这个句子的从句，because部分，变成独立主格结构, 要homework做从句的主语。
如果可以讲一下with his homework being finished，he can play with us. 这句话是个什么情况就更好了，我室友说这个也是独立主格，做伴随状语，但是我没听懂也没百度出来。

Answer 1

回答如下：本句的原因状语从句变成独立主格结构后，句子应该是这样：His homework having been finished, he can play with us. 还可以用with复合结构(相当于独立主格结构)来改写：With his homework done he can play with us. 下面分别讲述一下独立主格结构和with复合结构： 独立主格结构：它用来作状语，可以表示时间、原因、条件、方式、伴随等。其构成是：名词或代词(逻辑主语) + 分词、形容词、名词、有些副词、介词短语、不定式。with复合结构：它用来作定语、状语(同独立主格结构，可以表示时间、原因、条件、方式、伴随)。其结构是：with + 宾语+宾补(形容词、有些副词、不定式、分词、介词短语)。作状语时，with复合结构相当于独立主格结构。使用独立主格结构时，要用逗号跟主句分开。使用with复合结构时，它若在句首，可以用逗号跟主句隔开，也可以不用逗号; 但它在主句之后时，不用逗号。它们后跟不定式表示将要进行的动作。例如：Henry arriving there / With Henry arriving there(时间), it was eight o'clock in the morning. He injured in the leg / With him injured in the leg (原因), we gave up the trip. He entered the room, his hands ( being) red with cold / with his hands red with cold (伴随). Weather permitting / With weather permitting(条件), we will start out tomorrow. Tom stepped into the cave, pistol in hand / with a pistol in his hand(方式). The meeting to be held tomorrow / With the meeting to be held tomorrow (原因), we will have to give up this journey.
I know the girl with a necklace around her neck ( 定语).

Answer 2

我认为可以改为His homework finished，he can play with me.

Answer 3