英语翻译，高手看看有没有语法错误

首先纠正一下楼主的difficult

严格来讲都是错的。但是其实我们平时的考试啊，说话啊都无所谓（虽然放在对话口语有点略显啰嗦，但是可以在presentation时候说这样话）

第一句话里：宾语从句的谓语动词是错的，could be是错的，前面是work，并列需要对称，只能用do来指代work。
I found that it is difficult to work as effective as I cound be.
could有两种理解，一种是can的过去式，一种是比can语气委婉点的表达（由过去式延伸出来的意思）。
在这里因为主句是found过去式，所以应该这么改：
I found that it was difficult to work as effective as I could do(do指代的是work,可以省略).

第二句里：I found that it is difficult to be working as effective as I cound be .
同样宾从的谓语时态错误。could do也是错的。to be working，表示将来进行时，将来进行时表示将来某一时间正在进行的动作，可是居然被你found到了，逻辑不合理。只能用to work来表示，不定式在做主语时（it是形式主语）是没有将来的意思的，仅表示具体的、一次性动作。

综上改正方法有：
I found that it was difficult to work as effective as I could.
其实用一般现在时更加合理：
I find that it is difficult to work as effective as I can.

原句修改:
1.I found that it was difficult for me to work as effectively as I could.
2.I found that it was difficult to be working as effectively as I could be.<