这个英语句子有没有语法错误？

Question

Reviewing the American history of discriminating black Americans and the movement of fightingagainst racial discrimination, it is not difficult to draw a conclusion that the process is strenuous and too hard.

Answer 1

有问题。前半部分是非谓语动词（现在分词）结构充当时间状语，后半部分是it做形式主语动词不定时做实际主语。前半部分的逻辑主语（we）和后半部分的实际主语不一致，要做相应修改，要么采用独立主格结构，要么使前后主语一致。
修改一：
We reviewing the American history of discriminating black Americans and the movement of fightingagainst racial discrimination, it is not difficult to draw a conclusion that the process is strenuous and too hard.
修改二：
(After) reviewing the American history of discriminating black Americans and the movement of fighting against the racial discrimination, we have no difficulty drawing the conclusion that the process is much too strenuous and too hard as well.

Answer 2

问题主要是 作状语的现在分词 的逻辑主语 与句子主语 不一致 故 有语法错误
可改为 Reviewing the American history of discriminating black Americans and the movement of fightingagainst racial discrimination, we can have no difficulty drawing a conclusion that the process is strenuous and too hard.

Answer 3

你好。完善後的句子应该是：
After reviewing the American history of discriminating black Americans and the movement of fighting against the racial discrimination, we have no difficulty drawing the conclusion that the process is much too strenuous and too hard as well.本回答被提问者和网友采纳

Answer 4

After reviewing the American history of discriminating black Americans and the movement of fighting against the racial discrimination, we have no difficulty drawing the conclusion that the process is much too strenuous and too hard as well

Answer 5

When we review the American history of discriminating black Americans and the movement of fightingagainst racial discrimination, it is not difficult to draw a conclusion that the process is strenuous and too hard.